diff --git a/src/main/java/edu/group5/app/App.java b/src/main/java/edu/group5/app/App.java
index 6704bd2..d657fb8 100644
--- a/src/main/java/edu/group5/app/App.java
+++ b/src/main/java/edu/group5/app/App.java
@@ -1,25 +1,100 @@
 package edu.group5.app;
 
 import edu.group5.app.control.MainController;
+import edu.group5.app.control.wrapper.DbWrapper;
+import edu.group5.app.control.wrapper.OrgApiWrapper;
+import edu.group5.app.model.donation.Donation;
+import edu.group5.app.model.donation.DonationRepository;
+import edu.group5.app.model.donation.DonationService;
+import edu.group5.app.model.organization.OrganizationRepository;
+import edu.group5.app.model.organization.OrganizationService;
+import edu.group5.app.model.user.User;
+import edu.group5.app.model.user.UserRepository;
+import edu.group5.app.model.user.UserService;
 import javafx.application.Application;
 import javafx.scene.Scene;
 import javafx.scene.image.Image;
 import javafx.stage.Stage;
 
+import java.util.List;
+
+import java.util.logging.Logger;
+
 /**
- * Hello world!
+ * Main entry point for the Help-Me-Help charity donation application.
+ * Handles database connection, data loading, and application setup.
  */
 public class App extends Application {
+  DbWrapper dbWrapper;
+  UserRepository userRepository;
+  DonationRepository donationRepository;
+  private Logger logger;
+  private MainController controller;
+  private Scene scene;
+
   @Override
-  public void start(Stage stage) {
-    MainController controller = new MainController();
+  public void init() {
+    this.logger = Logger.getLogger(App.class.getName());
+    this.logger.info("Application starting");
+
+    this.dbWrapper = new DbWrapper(false);
+    OrgApiWrapper orgApiWrapper = new OrgApiWrapper("https://app.innsamlingskontrollen.no/api/public/v1/all");
+
+    while (!dbWrapper.connect()) {
+      this.logger.warning("Failed to connect to database");
+    }
+
+    // Load data from database
+    List<Object[]> userData = dbWrapper.importUsers();
+    List<Object[]> donationData = dbWrapper.fetchAllDonations();
+    dbWrapper.disconnect();
+
+    // Load organizations from API
+    Object[] organizationData = new Object[0];
+    try {
+      if (orgApiWrapper.importData()) {
+        organizationData = orgApiWrapper.getData();
+      }
+    } catch (InterruptedException e) {
+      System.err.println("Failed to load organization data: " + e.getMessage());
+    }
+
+    // Create repositories with fetched data
+    this.userRepository = new UserRepository(userData);
+    this.donationRepository = new DonationRepository(donationData);
+    OrganizationRepository organizationRepository = new OrganizationRepository(organizationData);
+
+    // Create services (backend wiring)
+    UserService userService = new UserService(this.userRepository);
+    DonationService donationService = new DonationService(this.donationRepository, organizationRepository);
+    OrganizationService organizationService = new OrganizationService(organizationRepository);
 
-    Scene scene = controller.getMainView().getScene();
-    controller.showLoginPage();
+    this.controller = new MainController(userService, donationService, organizationService);
+
+    this.scene = controller.getMainView().getScene();
+  }
+
+  @Override
+  public void start(Stage stage) {
+    this.controller.showLoginPage();
 
     stage.getIcons().add(new Image(getClass().getResource("/header/images/hmh-logo.png").toExternalForm()));
     stage.setTitle("Help-Me-Help");
-    stage.setScene(scene);
+    stage.setScene(this.scene);
     stage.show();
   }
+
+  @Override
+  public void stop() throws Exception {
+    super.stop();
+    this.logger.info("Application stopping");
+    this.dbWrapper.connect();
+    this.dbWrapper.exportUsers(this.userRepository.export());
+    this.dbWrapper.exportDonations(this.donationRepository.export());
+    this.dbWrapper.disconnect();
+  }
+
+  public static void main(String[] args) {
+    launch(args);
+  }
 }
diff --git a/src/main/java/edu/group5/app/control/BrowseCardController.java b/src/main/java/edu/group5/app/control/BrowseCardController.java
index 297ba9f..9f86271 100644
--- a/src/main/java/edu/group5/app/control/BrowseCardController.java
+++ b/src/main/java/edu/group5/app/control/BrowseCardController.java
@@ -1,5 +1,7 @@
 package edu.group5.app.control;
 
+import edu.group5.app.model.organization.Organization;
+
 public class BrowseCardController {
   private final MainController controller;
 
@@ -7,8 +9,8 @@ public BrowseCardController(MainController mainController) {
     this.controller = mainController;
   }
 
-  public void handleCardClick() {
-    System.out.println("Browse Card Clicked");
+  public void handleCardClick(Organization organization) {
+    controller.setCurrentOrganization(organization);
     controller.showOrganizationPage();
   }
 }
diff --git a/src/main/java/edu/group5/app/control/LoginPageController.java b/src/main/java/edu/group5/app/control/LoginPageController.java
index a06d135..b28f191 100644
--- a/src/main/java/edu/group5/app/control/LoginPageController.java
+++ b/src/main/java/edu/group5/app/control/LoginPageController.java
@@ -1,11 +1,42 @@
 package edu.group5.app.control;
 
+import edu.group5.app.model.user.User;
+import edu.group5.app.model.user.UserService;
+import edu.group5.app.view.loginpage.LoginPageView;
+
 public class LoginPageController {
   private final MainController controller;
+  private final UserService userService;
+  private LoginPageView view;
 
-  public LoginPageController(MainController controller) {
+  public LoginPageController(MainController controller, UserService userService) {
     this.controller = controller;
+    this.userService = userService;
+  }
+
+  public void setView(LoginPageView view) {
+    this.view = view;
   }
+
+  public void handleLoginBtn() {
+    String email = view.getEmail();
+    char[] passwordChars = view.getPassword();
+
+    if (email == null || email.trim().isEmpty() || passwordChars == null || passwordChars.length == 0) {
+      view.showError("Email and password are required");
+      return;
+    }
+
+    User user = userService.login(email, passwordChars);
+
+    if (user != null) {
+      controller.setCurrentUser(user);
+      controller.showHomePage();
+    } else {
+      view.showError("Invalid email or password");
+    }
+  }
+
   public void handleRegisterBtn() {
     System.out.println("Sign in button pressed");
     controller.showSignInPage();
diff --git a/src/main/java/edu/group5/app/control/MainController.java b/src/main/java/edu/group5/app/control/MainController.java
index 8106975..2b75487 100644
--- a/src/main/java/edu/group5/app/control/MainController.java
+++ b/src/main/java/edu/group5/app/control/MainController.java
@@ -1,10 +1,16 @@
 package edu.group5.app.control;
 
 import edu.group5.app.control.donationpage.DonationPageController;
+import edu.group5.app.model.donation.DonationService;
+import edu.group5.app.model.organization.Organization;
+import edu.group5.app.model.organization.OrganizationService;
 import edu.group5.app.model.user.User;
+import edu.group5.app.model.user.UserService;
 import edu.group5.app.view.MainView;
 import edu.group5.app.view.donationpage.DonationPageView;
 
+import java.math.BigDecimal;
+
 public class MainController {
   private final MainView view;
   private final HeaderController headerController;
@@ -13,10 +19,20 @@ public class MainController {
   private final BrowseCardController browseCardController;
   private final OrganizationPageController organizationPageController;
   private final DonationPageController donationPageController;
+  private final UserService userService;
+  private final DonationService donationService;
+  private final OrganizationService organizationService;
   private User currentUser;
+  private Organization currentOrganization;
+  private BigDecimal currentDonationAmount;
+
+  public MainController(UserService userService, DonationService donationService,
+                        OrganizationService organizationService) {
+    this.userService = userService;
+    this.donationService = donationService;
+    this.organizationService = organizationService;
 
-  public MainController() {
-    this.view = new MainView(this);
+    this.view = new MainView(this, userService);
     this.headerController = new HeaderController(this);
     this.homePageController = new HomePageController(this);
     this.browsePageController = new BrowsePageController(this);
@@ -25,6 +41,18 @@ public MainController() {
     this.donationPageController = new DonationPageController(this);
   }
 
+  public UserService getUserService() {
+    return userService;
+  }
+
+  public DonationService getDonationService() {
+    return donationService;
+  }
+
+  public OrganizationService getOrganizationService() {
+    return organizationService;
+  }
+
   public void setCurrentUser(User user) {
     this.currentUser = user;
   }
@@ -33,8 +61,26 @@ public User getCurrentUser() {
     return this.currentUser;
   }
 
+  public void setCurrentOrganization(Organization organization) {
+    this.currentOrganization = organization;
+  }
+
+  public Organization getCurrentOrganization() {
+    return this.currentOrganization;
+  }
+
+  public void setCurrentDonationAmount(BigDecimal amount) {
+    this.currentDonationAmount = amount;
+  }
+
+  public BigDecimal getCurrentDonationAmount() {
+    return this.currentDonationAmount;
+  }
+
   public void logout() {
     currentUser = null;
+    currentOrganization = null;
+    currentDonationAmount = null;
     showLoginPage();
   }
 
diff --git a/src/main/java/edu/group5/app/control/SignInPageController.java b/src/main/java/edu/group5/app/control/SignInPageController.java
index a51e4d5..2d8d874 100644
--- a/src/main/java/edu/group5/app/control/SignInPageController.java
+++ b/src/main/java/edu/group5/app/control/SignInPageController.java
@@ -1,15 +1,56 @@
 package edu.group5.app.control;
+import edu.group5.app.model.user.UserService;
+import edu.group5.app.view.loginpage.SignInPageView;
+
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+
+import edu.group5.app.model.user.User;
 
 public class SignInPageController {
   private final MainController controller;
+  private final UserService userService;
+  private SignInPageView view;
 
-  public SignInPageController(MainController controller) {
+  public SignInPageController(MainController controller, UserService userService) {
     this.controller = controller;
+    this.userService = userService;
+  }
+
+  public void setView(SignInPageView view) {
+  this.view = view;
   }
+
   public void handleSignInBtn() {
-    System.out.println("Sign in button pressed");
-    controller.showHomePage();
+    String firstName = view.getFirstName();
+    String lastName = view.getLastName();
+    String email = view.getEmail();
+    char[] passwordChars = view.getPassword();
+
+    if (firstName == null || firstName.trim().isEmpty() ||
+        lastName == null || lastName.trim().isEmpty() ||
+        email == null || email.trim().isEmpty() ||
+        passwordChars == null || passwordChars.length == 0) {
+      view.showError("All fields are required");
+      return;
+    }
+
+    String password = new String(passwordChars);
+    BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();
+    String hashedPassword = encoder.encode(password);
+
+    boolean success = userService.registerUser(
+        "Customer", firstName, lastName, email, hashedPassword);
+
+    if (success) {
+      User user = userService.getUserByEmail(email);
+
+      controller.setCurrentUser(user);
+      controller.showHomePage();
+    } else {
+      view.showError("Registration failed. Email may already be in use.");
+    }
   }
+
   public void handleLoginBtn() {
     System.out.println("Back to login button pressed");
     controller.showLoginPage();
diff --git a/src/main/java/edu/group5/app/control/donationpage/DonationPageController.java b/src/main/java/edu/group5/app/control/donationpage/DonationPageController.java
index 248c4a1..5fed3e2 100644
--- a/src/main/java/edu/group5/app/control/donationpage/DonationPageController.java
+++ b/src/main/java/edu/group5/app/control/donationpage/DonationPageController.java
@@ -1,6 +1,11 @@
 package edu.group5.app.control.donationpage;
 
 import edu.group5.app.control.MainController;
+import edu.group5.app.model.organization.Organization;
+import edu.group5.app.model.user.Customer;
+import edu.group5.app.model.user.User;
+
+import java.math.BigDecimal;
 
 public class DonationPageController {
   private final MainController controller;
@@ -9,7 +14,46 @@ public DonationPageController(MainController controller) {
     this.controller = controller;
   }
   public void handleDonationBtn() {
-    System.out.println("Donating");
+    // Get session data from MainController
+    User currentUser = controller.getCurrentUser();
+    Organization currentOrg = controller.getCurrentOrganization();
+    BigDecimal amount = controller.getCurrentDonationAmount();
+
+    if (currentUser == null) {
+      System.err.println("Error: No user logged in");
+      return;
+    }
+    if (!(currentUser instanceof Customer customer)) {
+      System.err.println("Error: Only customers can donate");
+      return;
+    }
+    if (currentOrg == null) {
+      System.err.println("Error: No organization selected");
+      return;
+    }
+    if (amount == null || amount.compareTo(BigDecimal.ZERO) <= 0) {
+      System.err.println("Error: Invalid donation amount");
+      return;
+    }
+
+    // Create donation via service
+    boolean success = controller.getDonationService().donate(
+        customer,
+        currentOrg.orgNumber(),
+        amount,
+        "Online"
+    );
+
+    if (success) {
+      System.out.println("Donation created: " + amount + " kr to " + currentOrg.name());
+    } else {
+      System.err.println("Failed to create donation");
+    }
+
+    // Clear donation session state
+    controller.setCurrentDonationAmount(null);
+
+    // Navigate to payment complete
     controller.showPaymentCompletePage();
   }
 
diff --git a/src/main/java/edu/group5/app/control/wrapper/DbWrapper.java b/src/main/java/edu/group5/app/control/wrapper/DbWrapper.java
index 65196dc..7e3adc0 100644
--- a/src/main/java/edu/group5/app/control/wrapper/DbWrapper.java
+++ b/src/main/java/edu/group5/app/control/wrapper/DbWrapper.java
@@ -95,10 +95,13 @@ public List<Object[]> importUsers() {
 
   public int exportUsers(List<Object[]> data) {
     this.importUsers();
-    
+
     if (data == null) {
       throw new IllegalArgumentException("data can't be null");
     }
+    if (data.isEmpty()) {
+      return 0;
+    }
     if (data.get(0).length != 6) {
       throw new IllegalArgumentException("data's arrays must have a length of 6");
     }
@@ -141,7 +144,7 @@ public int exportUsers(List<Object[]> data) {
     return rowsAffected;
   }
 
-  private List<Object[]> importDonations() {
+  public List<Object[]> fetchAllDonations() {
     return this.importDonations(0, true);
   }
 
@@ -182,12 +185,15 @@ private List<Object[]> importDonations(int user_id, boolean all) {
     return this.donations;
   }
 
-  public int exportDonations(List<Object[]> data) {  
-    this.importDonations();
-    
+  public int exportDonations(List<Object[]> data) {
+    this.fetchAllDonations();
+
     if (data == null) {
       throw new IllegalArgumentException("data can't be null");
     }
+    if (data.isEmpty()) {
+      return 0;
+    }
     if (data.get(0).length != 6) {
       throw new IllegalArgumentException("data's arrays must have a length of 6");
     }
diff --git a/src/main/java/edu/group5/app/model/DBRepository.java b/src/main/java/edu/group5/app/model/DBRepository.java
index f3363b7..3cd1fa9 100644
--- a/src/main/java/edu/group5/app/model/DBRepository.java
+++ b/src/main/java/edu/group5/app/model/DBRepository.java
@@ -1,18 +1,21 @@
 package edu.group5.app.model;
+
 import java.util.HashMap;
 import java.util.Map;
 import java.util.List;
+
 /**
  * Abstract base class for repositories that store their data
  * in a database-related structure.
  *
  * <p>
- *   Extends {@link Repository} and specifies that the content
- *   is stored as a {@link Map}.
+ * Extends {@link Repository} and specifies that the content
+ * is stored as a {@link Map}.
  * </p>
  */
 public abstract class DBRepository<K, V> extends Repository<K, V> {
   protected final Map<K, V> contentLock;
+
   /**
    * Constructs a DBRepository with the given content.
    *
@@ -23,19 +26,18 @@ protected DBRepository(Map<K, V> content) {
     this.contentLock = new HashMap<>();
   }
 
-  protected void updateContentLock() {
-    synchronized (contentLock) {
-      contentLock.clear();
-      contentLock.putAll(this.content);
-    }
-  }
+  protected abstract void updateContentLock();
 
   public abstract boolean addContent(V value);
 
   /**
-   * Exports the repository content as a list of Object arrays, where each array represents a row of data.
-   * This method is intended for converting the repository content into a format suitable for database storage or export.
-   * @return a List of Object arrays representing the repository content for database export
+   * Exports the repository content as a list of Object arrays, where each array
+   * represents a row of data.
+   * This method is intended for converting the repository content into a format
+   * suitable for database storage or export.
+   * 
+   * @return a List of Object arrays representing the repository content for
+   *         database export
    */
   public abstract List<Object[]> export();
 }
diff --git a/src/main/java/edu/group5/app/model/donation/DonationRepository.java b/src/main/java/edu/group5/app/model/donation/DonationRepository.java
index 6181460..a55ea74 100644
--- a/src/main/java/edu/group5/app/model/donation/DonationRepository.java
+++ b/src/main/java/edu/group5/app/model/donation/DonationRepository.java
@@ -15,7 +15,7 @@
  * Repository class for Donation.
  *
  * <p>
- *   Extends {@link DBRepository} and manages Donation entities.
+ * Extends {@link DBRepository} and manages Donation entities.
  * </p>
  */
 public class DonationRepository extends DBRepository<Integer, Donation> {
@@ -23,10 +23,12 @@ public class DonationRepository extends DBRepository<Integer, Donation> {
 
   /**
    * Constructs DonationRepository from a list of Object[] rows from the database.
-   * @param rows List of Object[] representing donations from the DB. 
-   * Each row must have 6 elements:
-   * [donationId, userId, organizationId, amount, date, paymentMethod]
-   * @throws IllegalArgumentException if the input list is null or any row is invalid
+   * 
+   * @param rows List of Object[] representing donations from the DB.
+   *             Each row must have 6 elements:
+   *             [donationId, userId, organizationId, amount, date, paymentMethod]
+   * @throws IllegalArgumentException if the input list is null or any row is
+   *                                  invalid
    */
   public DonationRepository(List<Object[]> rows) {
     super(new HashMap<>());
@@ -35,12 +37,12 @@ public DonationRepository(List<Object[]> rows) {
     }
     this.content = new HashMap<>();
     for (Object[] row : rows) {
-      if (row == null || row.length != 6 ) {
+      if (row == null || row.length != 6) {
         throw new IllegalArgumentException("Each row must contain exactly 6 elements");
       }
       int donationId = (int) row[0];
       int customerId = (int) row[1];
-      int organizationId = (int) row[2];  
+      int organizationId = (int) row[2];
       BigDecimal amount = (BigDecimal) row[3];
       Timestamp date = (Timestamp) row[4];
       String paymentMethod = (String) row[5];
@@ -48,23 +50,39 @@ public DonationRepository(List<Object[]> rows) {
       Donation donation = new Donation(donationId, customerId, organizationId, amount, date, paymentMethod);
       this.content.put(donationId, donation);
     }
-    super.updateContentLock();
+    this.updateContentLock();
+  }
+
+  @Override
+  protected void updateContentLock() {
+    synchronized (contentLock) {
+      this.contentLock.clear();
+      this.contentLock.putAll(this.content);
+    }
   }
 
   @Override
   public List<Object[]> export() {
-    return content.entrySet().stream()
-    .sorted(Map.Entry.comparingByKey())
-    .map(entry -> { Donation donation = entry.getValue();
-        return new Object[] {
-            donation.donationId(), donation.userId(),
-            donation.organizationId(), donation.amount(),
-            donation.date(), donation.paymentMethod()};})
-    .toList();
+    Map<Integer, Donation> output = new HashMap<>(this.content);
+    for (int i : super.contentLock.keySet()) {
+      output.remove(i);
+    }
+    this.updateContentLock();
+    return output.entrySet().stream()
+        .sorted(Map.Entry.comparingByKey())
+        .map(entry -> {
+          Donation donation = entry.getValue();
+          return new Object[] {
+              donation.donationId(), donation.userId(),
+              donation.organizationId(), donation.amount(),
+              donation.date(), donation.paymentMethod() };
+        })
+        .toList();
   }
 
   /**
    * Retrieves a donation by its ID.
+   * 
    * @param donationId the ID of the donation to retrieve
    * @return the Donation object with the specified ID, or null if not found
    * @throws IllegalArgumentException if the donationId is not positive
@@ -77,10 +95,12 @@ public Donation getDonationById(int donationId) {
   }
 
   /**
-   * Generates the next donation ID based on the current maximum ID in the repository.
+   * Generates the next donation ID based on the current maximum ID in the
+   * repository.
+   * 
    * @return the next donation ID to be used for a new donation
    */
-  public int getNextDonationId() { 
+  public int getNextDonationId() {
     return content.keySet().stream().max(Integer::compareTo).orElse(0) + 1;
   } /* TODO change this when data database is introduced */
 
@@ -91,22 +111,22 @@ public Map<Integer, Donation> getAllDonations() {
   /**
    * Adds a new donation to the repository
    * <p>
-   *   The donation is stored using its {@code donationId} as the key.
-   *   If a donation with the same ID already exists, the donation
-   *   will not be added.
+   * The donation is stored using its {@code donationId} as the key.
+   * If a donation with the same ID already exists, the donation
+   * will not be added.
    * </p>
    *
    * @param donation the donation to add
    * @return {@code true} if the donation was successfully added, and
-   * {@code false} if a donation with the same ID already exists
+   *         {@code false} if a donation with the same ID already exists
    */
   @Override
   public boolean addContent(Donation donation) {
     if (donation == null) {
       throw new IllegalArgumentException("Donation cannot be null");
     }
-    if (content.containsKey(donation.donationId())){
-      return false; 
+    if (content.containsKey(donation.donationId())) {
+      return false;
     }
     this.content.put(donation.donationId(), donation);
     return true;
@@ -116,12 +136,12 @@ public boolean addContent(Donation donation) {
    * Returns all donations sorted by date (ascending).
    *
    * <p>
-   *   The returned map preserves the sorted order.
+   * The returned map preserves the sorted order.
    * </p>
    *
    * @return a new {@link HashMap} containing the donations sorted by date
    */
-  public HashMap<Integer, Donation> sortByDate(){
+  public HashMap<Integer, Donation> sortByDate() {
     return content.entrySet().stream()
         .sorted(Map.Entry.comparingByValue(
             Comparator.comparing(Donation::date)))
@@ -136,7 +156,7 @@ public HashMap<Integer, Donation> sortByDate(){
    * Returns all donations sorted by amount (ascending).
    *
    * <p>
-   *   The returned map preserves the sorted order from lowest to highest amount.
+   * The returned map preserves the sorted order from lowest to highest amount.
    * </p>
    *
    * @return a new {@link HashMap} containing the donations sorted by amount.
@@ -149,12 +169,12 @@ public HashMap<Integer, Donation> sortByAmount() {
             Map.Entry::getKey,
             Map.Entry::getValue,
             (e1, e2) -> e1,
-            LinkedHashMap::new
-        ));
+            LinkedHashMap::new));
   }
 
   /**
    * Returns all donations associated with a specific organization.
+   * 
    * @param orgNumber the organization ID to filter by
    * @return a map containing all donations that belong to the given organization
    * @throws IllegalArgumentException if the orgNumber is not positive
@@ -165,17 +185,17 @@ public HashMap<Integer, Donation> filterByOrganization(int orgNumber) {
     }
     return content.entrySet()
         .stream()
-        .filter(entry -> entry.getValue().organizationId()  == orgNumber)
+        .filter(entry -> entry.getValue().organizationId() == orgNumber)
         .collect(Collectors.toMap(
             Map.Entry::getKey,
             Map.Entry::getValue,
             (e1, e2) -> e1,
-            LinkedHashMap::new
-        ));
+            LinkedHashMap::new));
   }
 
   /**
    * Returns all donations made by a specific user.
+   * 
    * @param userId the user ID to filter by
    * @return a map containing all donations that belong to the given user
    * @throws IllegalArgumentException if the userId is not positive
@@ -190,7 +210,6 @@ public HashMap<Integer, Donation> filterByUser(int userId) {
             Map.Entry::getKey,
             Map.Entry::getValue,
             (e1, e2) -> e1,
-            LinkedHashMap::new
-        ));
+            LinkedHashMap::new));
   }
 }
diff --git a/src/main/java/edu/group5/app/model/organization/OrganizationService.java b/src/main/java/edu/group5/app/model/organization/OrganizationService.java
new file mode 100644
index 0000000..c5979f5
--- /dev/null
+++ b/src/main/java/edu/group5/app/model/organization/OrganizationService.java
@@ -0,0 +1,58 @@
+package edu.group5.app.model.organization;
+
+import java.util.Map;
+
+/**
+ * Service class for managing organization-related operations.
+ * It interacts with the OrganizationRepository to retrieve organization information
+ * and contains business logic associated with organization management.
+ */
+public class OrganizationService {
+  private OrganizationRepository organizationRepository;
+
+  /**
+   * Constructs an OrganizationService with the given OrganizationRepository.
+   * @param organizationRepository the OrganizationRepository to use for managing organization data; must not be null
+   * @throws IllegalArgumentException if organizationRepository is null
+   */
+  public OrganizationService(OrganizationRepository organizationRepository) {
+    if (organizationRepository == null) {
+      throw new IllegalArgumentException("OrganizationRepository cannot be null");
+    }
+    this.organizationRepository = organizationRepository;
+  }
+
+  /**
+   * Getter for the OrganizationRepository used by this service.
+   * @return the OrganizationRepository instance used by this service
+   */
+  public OrganizationRepository getOrganizationRepository() {
+    return this.organizationRepository;
+  }
+
+  /**
+   * Retrieves all trusted organizations.
+   * @return a map of trusted organizations by organization number
+   */
+  public Map<Integer, Organization> getTrustedOrganizations() {
+    return organizationRepository.getTrustedOrganizations();
+  }
+
+  /**
+   * Finds an organization by its organization number.
+   * @param orgNumber the organization number to find
+   * @return the Organization if found, null otherwise
+   */
+  public Organization findByOrgNumber(int orgNumber) {
+    return organizationRepository.findByOrgNumber(orgNumber);
+  }
+
+  /**
+   * Finds an organization by its name.
+   * @param name the name of the organization
+   * @return the Organization if found, null otherwise
+   */
+  public Organization findByOrgName(String name) {
+    return organizationRepository.findByOrgName(name);
+  }
+}
diff --git a/src/main/java/edu/group5/app/model/user/UserRepository.java b/src/main/java/edu/group5/app/model/user/UserRepository.java
index 692126f..193f433 100644
--- a/src/main/java/edu/group5/app/model/user/UserRepository.java
+++ b/src/main/java/edu/group5/app/model/user/UserRepository.java
@@ -6,11 +6,13 @@
 
 import edu.group5.app.model.DBRepository;
 
-public class UserRepository extends DBRepository<Integer, User>{
+public class UserRepository extends DBRepository<Integer, User> {
   public final static String ROLE_CUSTOMER = "Customer";
+
   /**
    * Constructs UserRepository using Hashmap,
    * and extends the content from DBRepository.
+   * 
    * @param content the underlying map used to store users,
    *                where the key represents the user ID
    */
@@ -20,7 +22,7 @@ public UserRepository(List<Object[]> rows) {
       throw new IllegalArgumentException("The list of rows cannot be null");
     }
     for (Object[] row : rows) {
-      if (row == null || row.length != 6 ) {
+      if (row == null || row.length != 6) {
         throw new IllegalArgumentException("Each row must contain exactly 6 elements");
       }
       int userId = (int) row[0];
@@ -38,28 +40,46 @@ public UserRepository(List<Object[]> rows) {
       }
       this.content.put(userId, user);
     }
-    super.updateContentLock();
+    this.updateContentLock();
   }
 
+  @Override
+  protected void updateContentLock() {
+    synchronized (contentLock) {
+      this.contentLock.clear();
+      this.contentLock.putAll(this.content);
+    }
+  }
 
   @Override
   public List<Object[]> export() {
-    return content.entrySet().stream()
-        .sorted(Map.Entry.comparingByKey()) 
-        .map(entry -> { User user = entry.getValue();
-            return new Object[]{user.getUserId(), user.getRole(),
-                user.getFirstName(), user.getLastName(),
-                user.getEmail(), user.getPasswordHash()};})
+    Map<Integer, User> output = new HashMap<>(this.content);
+    for (int i : contentLock.keySet()) {
+      output.remove(i);
+    }
+    this.updateContentLock();
+    return output.entrySet().stream()
+        .sorted(Map.Entry.comparingByKey())
+        .map(entry -> {
+          User user = entry.getValue();
+          return new Object[] { user.getUserId(), user.getRole(),
+              user.getFirstName(), user.getLastName(),
+              user.getEmail(), user.getPasswordHash() };
+        })
         .toList();
+
   }
 
   public HashMap<Integer, User> getUsers() {
     return new HashMap<>(content);
   }
+
   /**
    * Retrieves a user by their unique identifier.
+   * 
    * @param userId the unique identifier of the user to retrieve
-   * @return the user with the specified ID, or {@code null} if no such user exists
+   * @return the user with the specified ID, or {@code null} if no such user
+   *         exists
    * @throws IllegalArgumentException if the userId is not positive
    */
   public User getUserById(int userId) {
@@ -72,12 +92,13 @@ public User getUserById(int userId) {
   /**
    * Generates the next user ID based on repository size.
    * Uses size+1 and then moves forward if that ID is already taken.
+   * 
    * @return the next available user ID
    * @throws IllegalStateException if no available user ID can be found
    */
-  public int getNextUserId() { 
+  public int getNextUserId() {
     if (content.isEmpty()) {
-        return 1;
+      return 1;
     }
     int maxKey = content.keySet().stream().max(Integer::compareTo).orElseThrow(
         () -> new IllegalStateException("No keys found"));
@@ -88,21 +109,21 @@ public int getNextUserId() {
   /**
    * Adds a new user to the repository
    * <p>
-   *   The user is stored using its {@code userId} as the key.
-   *   If a user with the same ID already exists, the user
-   *   will not be added.
+   * The user is stored using its {@code userId} as the key.
+   * If a user with the same ID already exists, the user
+   * will not be added.
    * </p>
    *
    * @param user the user to add
    * @return {@code true} if the user was successfully added, and
-   * {@code false} if a user with the same ID already exists
+   *         {@code false} if a user with the same ID already exists
    */
   @Override
   public boolean addContent(User user) {
     if (user == null) {
       throw new IllegalArgumentException("User cannot be null");
     }
-    if (content.containsKey(user.getUserId())){
+    if (content.containsKey(user.getUserId())) {
       return false;
     }
     this.content.put(user.getUserId(), user);
@@ -111,8 +132,10 @@ public boolean addContent(User user) {
 
   /**
    * Finds a user by their email address.
+   * 
    * @param email the email address of the user to find
-   * @return the user with the specified email address, or {@code null} if no such user exists
+   * @return the user with the specified email address, or {@code null} if no such
+   *         user exists
    */
   public User findUserByEmail(String email) {
     if (email == null || email.trim().isEmpty()) {
@@ -122,5 +145,5 @@ public User findUserByEmail(String email) {
         .filter(user -> user.getEmail().equals(email))
         .findFirst()
         .orElse(null);
-  } 
+  }
 }
diff --git a/src/main/java/edu/group5/app/model/user/UserService.java b/src/main/java/edu/group5/app/model/user/UserService.java
index 44e092b..628c785 100644
--- a/src/main/java/edu/group5/app/model/user/UserService.java
+++ b/src/main/java/edu/group5/app/model/user/UserService.java
@@ -21,7 +21,7 @@ public UserService(UserRepository userRepository) {
   }
 
   /**
-   * Getter for the UserRepository used by this service. 
+   * Getter for the UserRepository used by this service.
    * This method allows access to the user repository for managing user data and performing operations such as registration and login.
    * @return the UserRepository instance used by this service
    */
@@ -65,7 +65,7 @@ public boolean registerUser(String role, String firstName, String lastName,
    * Authenticates a user based on the provided email and password.
    * @param email the email address of the user attempting to log in; must not be null or empty
    * @param password the plaintext password of the user attempting to log in; must not be null or empty
-   * @return the authenticated User object if the login is successful 
+   * @return the authenticated User object if the login is successful
    * (i.e., the user exists and the password is correct), null otherwise
    * @throws IllegalArgumentException if email is null or empty, or if password is null or empty
    */
@@ -79,4 +79,16 @@ public User login(String email, char[] password) {
     }
     return null;
   }
+
+  /**
+   * Retrieves a user by email address.
+   * @param email the email address of the user to find; must not be null or empty
+   * @return the User object if found, null otherwise
+   */
+  public User getUserByEmail(String email) {
+    if (email == null || email.trim().isEmpty()) {
+      return null;
+    }
+    return this.userRepository.findUserByEmail(email);
+  }
 }
diff --git a/src/main/java/edu/group5/app/view/MainView.java b/src/main/java/edu/group5/app/view/MainView.java
index 27eeac5..e35935f 100644
--- a/src/main/java/edu/group5/app/view/MainView.java
+++ b/src/main/java/edu/group5/app/view/MainView.java
@@ -5,7 +5,8 @@
 import edu.group5.app.control.*;
 import edu.group5.app.control.donationpage.DonationPageController;
 import edu.group5.app.control.donationpage.PaymentCompleteController;
-import edu.group5.app.model.user.Customer;
+import edu.group5.app.model.user.User;
+import edu.group5.app.model.user.UserService;
 import edu.group5.app.view.donationpage.DonationPageView;
 import edu.group5.app.view.donationpage.PaymentCompletePageView;
 import edu.group5.app.view.homepage.HomePageView;
@@ -17,6 +18,7 @@
 import javafx.scene.layout.BorderPane;
 
 public class MainView {
+  private final MainController mainController;
   private final HeaderController headerController;
   private final HomePageController homePageController;
   private final LoginPageController loginPageController;
@@ -26,11 +28,12 @@ public class MainView {
   private final Scene scene;
   private final BorderPane root;
 
-  public MainView(MainController mainController) {
+  public MainView(MainController mainController, UserService userService) {
+    this.mainController = mainController;
     this.headerController = new HeaderController(mainController);
     this.homePageController = new HomePageController(mainController);
-    this.loginPageController = new LoginPageController(mainController);
-    this.signInPageController = new SignInPageController(mainController);
+    this.loginPageController = new LoginPageController(mainController, userService);
+    this.signInPageController = new SignInPageController(mainController, userService);
     this.donationPageController = new DonationPageController(mainController);
     this.paymentCompleteController = new PaymentCompleteController(mainController);
     this.root = new BorderPane();
@@ -55,18 +58,18 @@ public void showLoginPage() {
   }
 
   public void showBrowsePage(BrowsePageController browsePageController, BrowseCardController browseCardController, HeaderController headerController) {
-    root.setCenter(new BrowsePageView(getScene(), browsePageController, browseCardController, headerController));
+    root.setCenter(new BrowsePageView(getScene(), browsePageController, browseCardController, headerController, mainController));
   }
 
   public void showOrganizationPage(OrganizationPageController organizationController, HeaderController headerController) {
-    root.setCenter(new OrganizationPageView(organizationController, headerController));
+    root.setCenter(new OrganizationPageView(organizationController, headerController, mainController));
   }
 
   public void showSignInPage() {
     root.setCenter(new SignInPageView(signInPageController));
   }
   public void showDonationPage() {
-    root.setCenter(new DonationPageView(donationPageController, headerController));
+    root.setCenter(new DonationPageView(donationPageController, headerController, mainController));
   }
   public void showPaymentCompletePage() {
     root.setCenter(new PaymentCompletePageView(paymentCompleteController));
@@ -75,13 +78,9 @@ public void showPaymentCompletePage() {
   public void showAboutUsPage() {}
 
   public void showUserPage() {
-    Customer testCustomer = new Customer(
-        1,
-        "Jinwoo",
-        "Son",
-        "aurafarmer@gmail.com",
-        "hashedpassword"
-    );
-    root.setCenter(new UserPageView(headerController, testCustomer));
+    User currentUser = mainController.getCurrentUser();
+    if (currentUser != null) {
+      root.setCenter(new UserPageView(headerController, mainController));
+    }
   }
 }
diff --git a/src/main/java/edu/group5/app/view/browsepage/BrowseCard.java b/src/main/java/edu/group5/app/view/browsepage/BrowseCard.java
index 02cc094..ad4be8a 100644
--- a/src/main/java/edu/group5/app/view/browsepage/BrowseCard.java
+++ b/src/main/java/edu/group5/app/view/browsepage/BrowseCard.java
@@ -1,6 +1,7 @@
 package edu.group5.app.view.browsepage;
 
 import edu.group5.app.control.BrowseCardController;
+import edu.group5.app.model.organization.Organization;
 import javafx.geometry.Pos;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
@@ -10,23 +11,25 @@
 
 public class BrowseCard extends VBox {
   private final BrowseCardController controller;
+  private final Organization organization;
 
-  public BrowseCard(BrowseCardController browseCardController, String img, String name) {
+  public BrowseCard(BrowseCardController browseCardController, Organization org, String img) {
     this.controller = browseCardController;
+    this.organization = org;
     setId("mainContainer");
     getStylesheets().add(getClass().getResource("/browsepage/browse_org.css").toExternalForm());
 
     getChildren().addAll(
         imageContainer(img),
-        orgName(name),
+        orgName(org.name()),
         checkMarkContainer()
     );
 
     setOnMouseClicked(e -> {
-      controller.handleCardClick();
+      controller.handleCardClick(organization);
     });
 
-    setSpacing(20);
+    setSpacing(10);
     setFillWidth(true);
     setAlignment(Pos.CENTER);
   }
@@ -34,8 +37,8 @@ public BrowseCard(BrowseCardController browseCardController, String img, String
   private StackPane imageContainer(String img) {
     StackPane imageContainer = new StackPane();
     imageContainer.setId("imageContainer");
-    imageContainer.setPrefHeight(120);
-    imageContainer.setPrefWidth(120);
+    imageContainer.setPrefHeight(80);
+    imageContainer.setPrefWidth(80);
     imageContainer.setMaxWidth(Double.MAX_VALUE);
 
     ImageView logo = new ImageView(
@@ -45,7 +48,7 @@ private StackPane imageContainer(String img) {
     logo.setId("logo");
     logo.setSmooth(true);
     logo.setPreserveRatio(true);
-    logo.setFitHeight(150);
+    logo.setFitHeight(80);
 
     imageContainer.getChildren().add(logo);
     return imageContainer;
@@ -54,6 +57,7 @@ private StackPane imageContainer(String img) {
   private Text orgName(String text) {
     Text orgName = new Text(text);
     orgName.setId("orgName");
+    orgName.setWrappingWidth(150);
     return orgName;
   }
 
diff --git a/src/main/java/edu/group5/app/view/browsepage/BrowsePageView.java b/src/main/java/edu/group5/app/view/browsepage/BrowsePageView.java
index 4cb54b2..a2d92c8 100644
--- a/src/main/java/edu/group5/app/view/browsepage/BrowsePageView.java
+++ b/src/main/java/edu/group5/app/view/browsepage/BrowsePageView.java
@@ -3,6 +3,8 @@
 import edu.group5.app.control.BrowseCardController;
 import edu.group5.app.control.BrowsePageController;
 import edu.group5.app.control.HeaderController;
+import edu.group5.app.control.MainController;
+import edu.group5.app.model.organization.Organization;
 import edu.group5.app.view.Header;
 import javafx.geometry.Pos;
 import javafx.scene.Scene;
@@ -10,15 +12,22 @@
 import javafx.scene.control.TextField;
 import javafx.scene.layout.*;
 
+import java.util.Map;
+import java.util.stream.Collectors;
+
 public class BrowsePageView extends BorderPane {
   private final Scene scene;
   private final BrowsePageController controller;
   private final BrowseCardController orgController;
+  private final MainController mainController;
+  private GridPane organizationGrid;
+  private Map<Integer, Organization> allOrganizations;
 
-  public BrowsePageView(Scene mainScene, BrowsePageController browsePageController, BrowseCardController browseCardController, HeaderController headerController) {
+  public BrowsePageView(Scene mainScene, BrowsePageController browsePageController, BrowseCardController browseCardController, HeaderController headerController, MainController mainController) {
     this.scene = mainScene;
     this.controller = browsePageController;
     this.orgController = browseCardController;
+    this.mainController = mainController;
     getStylesheets().add(getClass().getResource("/browsepage/browsepage.css").toExternalForm());
     Header headerView = new Header(headerController);
     setTop(headerView);
@@ -29,11 +38,16 @@ private ScrollPane createBody() {
     ScrollPane body = new ScrollPane();
     body.setId("body");
     body.setFitToWidth(true);
+    body.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
+    body.setStyle("-fx-focus-color: transparent; -fx-faint-focus-color: transparent;");
+
     VBox vBox = new VBox();
+    vBox.setStyle("-fx-padding: 10;");
     vBox.setSpacing(10);
+    vBox.setMaxWidth(Double.MAX_VALUE);
     vBox.getChildren().addAll(
       createSearchSection(),
-      createOrganizationSection()
+      createOrganizationSection(null)
     );
     body.setContent(vBox);
     return body;
@@ -42,25 +56,39 @@ private ScrollPane createBody() {
   private HBox createSearchSection() {
     HBox searchSection = new HBox();
     TextField searchField = new TextField();
-    searchField.setPromptText("Search..");
+    searchField.setPromptText("Search organizations...");
+
+    // Add listener for search text changes
+    searchField.textProperty().addListener((obs, oldVal, newVal) -> {
+      updateOrganizationGrid(newVal.trim());
+    });
+
     searchSection.getChildren().add(searchField);
     return searchSection;
   }
 
-  private GridPane createOrganizationSection() {
+  private GridPane createOrganizationSection(String searchTerm) {
     GridPane grid = new GridPane();
     grid.setId("card-grid");
-    grid.setHgap(10);
-    grid.setVgap(10);
-    grid.setMaxWidth(Double.MAX_VALUE - 50);
+    grid.setHgap(20);
+    grid.setVgap(20);
+    grid.setStyle("-fx-padding: 0;");
+    grid.setMaxWidth(Double.MAX_VALUE);
+
+    if (allOrganizations == null) {
+      allOrganizations = mainController.getOrganizationService().getTrustedOrganizations();
+    }
+
+    // Filter organizations by search term
+    Map<Integer, Organization> organizations = filterOrganizations(searchTerm);
 
     int column = 0;
     int row = 0;
-    for (int i = 0; i < 16; i++) {
-      BrowseCard card = new BrowseCard(orgController, "/browsepage/images/children_of_shambala.png", "Shambala Foundation");
 
-      GridPane.setFillWidth(card, true);
-      grid.setAlignment(Pos.CENTER);
+    for (Organization org : organizations.values()) {
+      String defaultImg = "/browsepage/images/children_of_shambala.png";
+      BrowseCard card = new BrowseCard(orgController, org, defaultImg);
+
       grid.add(card, column, row);
 
       column++;
@@ -76,6 +104,42 @@ private GridPane createOrganizationSection() {
       col.setPercentWidth(25);
       grid.getColumnConstraints().add(col);
     }
+
+    // Store reference for later updates
+    if (organizationGrid == null) {
+      organizationGrid = grid;
+    }
+
     return grid;
   }
+
+  private Map<Integer, Organization> filterOrganizations(String searchTerm) {
+    // If no search term, return all organizations
+    if (searchTerm == null || searchTerm.isEmpty()) {
+      return allOrganizations;
+    }
+
+    String lowerSearchTerm = searchTerm.toLowerCase();
+    return allOrganizations.values().stream()
+        .filter(org -> org.name().toLowerCase().contains(lowerSearchTerm))
+        .collect(Collectors.toMap(
+            Organization::orgNumber,
+            org -> org
+        ));
+  }
+
+  private void updateOrganizationGrid(String searchTerm) {
+    if (organizationGrid == null) {
+      return;
+    }
+
+    organizationGrid.getChildren().clear();
+    organizationGrid.getColumnConstraints().clear();
+
+    // Rebuild grid with filtered organizations
+    GridPane updated = createOrganizationSection(searchTerm);
+
+    organizationGrid.getChildren().addAll(updated.getChildren());
+    organizationGrid.getColumnConstraints().addAll(updated.getColumnConstraints());
+  }
 }
diff --git a/src/main/java/edu/group5/app/view/donationpage/DonationPageView.java b/src/main/java/edu/group5/app/view/donationpage/DonationPageView.java
index 5cf7171..6c5e5e6 100644
--- a/src/main/java/edu/group5/app/view/donationpage/DonationPageView.java
+++ b/src/main/java/edu/group5/app/view/donationpage/DonationPageView.java
@@ -1,6 +1,7 @@
 package edu.group5.app.view.donationpage;
 
 import edu.group5.app.control.HeaderController;
+import edu.group5.app.control.MainController;
 import edu.group5.app.control.donationpage.DonationPageController;
 import edu.group5.app.view.Header;
 import javafx.geometry.Insets;
@@ -13,12 +14,23 @@
 import javafx.scene.layout.VBox;
 import javafx.scene.text.Text;
 import javafx.scene.text.TextAlignment;
+import javafx.scene.Node;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 public class DonationPageView extends BorderPane {
   private final DonationPageController controller;
+  private final MainController mainController;
+  private final List<Node> allDonationElements = new ArrayList<>();
+  private final Map<Object, BigDecimal> elementAmounts = new HashMap<>(); 
 
-  public DonationPageView(DonationPageController donationPageController, HeaderController headerController) {
+  public DonationPageView(DonationPageController donationPageController, HeaderController headerController, MainController mainController) {
     this.controller = donationPageController;
+    this.mainController = mainController;
     getStylesheets().add(getClass().getResource("/donationpage/donation.css").toExternalForm());
 
     Header headerView = new Header(headerController);
@@ -61,13 +73,14 @@ public Button createDonationButton(String title, String amount) {
     button.setTextAlignment(TextAlignment.CENTER);
     button.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);
     button.getStyleClass().add("donation-button");
+
+    BigDecimal parsedAmount = parseAmount(amount);
+    elementAmounts.put(button, parsedAmount);
+
     button.setOnAction(e -> {
-      if (button.getStyleClass().contains("donation-button-selected")) {
-        button.getStyleClass().remove("donation-button-selected");
-      } else {
-        button.getStyleClass().add("donation-button-selected");
-      }
+      selectDonationElement(button);
     });
+    allDonationElements.add(button);
     return button;
   }
   private VBox createCustomButton() {
@@ -89,6 +102,19 @@ private VBox createCustomButton() {
     box.setAlignment(Pos.CENTER);
     box.getStyleClass().add("donation-button");
 
+
+    box.setOnMouseClicked(e -> {
+      try {
+        BigDecimal amount = new BigDecimal(amountField.getText().trim());
+        elementAmounts.put(box, amount);
+        selectDonationElement(box);
+      } catch (NumberFormatException exception) {
+        System.err.println("Invalid custom donation amount: " + amountField.getText());
+      }
+      
+    });
+
+    allDonationElements.add(box);
     return box;
   }
   private HBox createDonateSection() {
@@ -100,7 +126,35 @@ private HBox createDonateSection() {
     section.setAlignment(Pos.CENTER);
     section.setPadding(new Insets(20, 0, 30, 0));
     return section;
+  }
 
+  private void selectDonationElement(Node element) {
+    // Remove selected class from all elements
+    for (Node node : allDonationElements) {
+      node.getStyleClass().remove("donation-button-selected");
+    }
+
+    element.getStyleClass().add("donation-button-selected");
+
+    // Extract and store the amount
+    extractAndStoreAmount(element);
+  }
+
+  private void extractAndStoreAmount(Node element) {
+    BigDecimal amount = elementAmounts.get(element);
+    if (amount != null) {
+      mainController.setCurrentDonationAmount(amount);
+    } else {
+      System.err.println("Error: No amount found for selected element");
+    }
+  }
+
+  private BigDecimal parseAmount(String amountStr) {
+    try {
+      return new BigDecimal(amountStr.replace("kr", "").trim());
+    } catch (NumberFormatException e) {
+      return BigDecimal.ZERO;
+    }
   }
 
-}
+}
\ No newline at end of file
diff --git a/src/main/java/edu/group5/app/view/loginpage/LoginPageView.java b/src/main/java/edu/group5/app/view/loginpage/LoginPageView.java
index d555301..96d83d7 100644
--- a/src/main/java/edu/group5/app/view/loginpage/LoginPageView.java
+++ b/src/main/java/edu/group5/app/view/loginpage/LoginPageView.java
@@ -15,9 +15,13 @@
 
 public class LoginPageView extends BorderPane {
   private final LoginPageController controller;
+  private TextField emailField;
+  private PasswordField passwordField;
+  private Label errorLabel;
 
   public LoginPageView(LoginPageController loginPageController) {
     this.controller = loginPageController;
+    this.controller.setView(this);
     LoginHeader loginHeaderView = new LoginHeader();
     setTop(loginHeaderView);
 
@@ -33,6 +37,20 @@ public LoginPageView(LoginPageController loginPageController) {
 
     setCenter(content);
   }
+
+  public String getEmail() {
+    return emailField.getText();
+  }
+
+  public char[] getPassword() {
+    return passwordField.getText().toCharArray();
+  }
+
+  public void showError(String message) {
+    errorLabel.setText(message);
+    errorLabel.setStyle("-fx-text-fill: red;");
+  }
+
   private VBox getOuterSection() {
     VBox outerSection = new VBox(12);
     outerSection.setAlignment(Pos.CENTER);
@@ -44,13 +62,20 @@ private VBox getLoginBox() {
     VBox loginSection = new VBox(12);
     loginSection.setAlignment(Pos.CENTER);
     loginSection.setId("login-box");
-    loginSection.getChildren().addAll(getEmailBox(), getPasswordBox(), getLoginBtn());
+    loginSection.getChildren().addAll(getErrorLabel(), getEmailBox(), getPasswordBox(), getLoginBtn());
     return loginSection;
   }
+
+  private Label getErrorLabel() {
+    errorLabel = new Label();
+    errorLabel.setPrefHeight(20);
+    return errorLabel;
+  }
+
   private VBox getEmailBox() {
     VBox emailBox = new VBox();
     emailBox.setMaxWidth(300);
-    TextField emailField = new TextField();
+    emailField = new TextField();
     emailField.setPromptText("aurafarmer@gmail.com");
     emailField.setMaxWidth(300);
     emailBox.getChildren().addAll(new Label("Email"), emailField);
@@ -59,7 +84,7 @@ private VBox getEmailBox() {
   private VBox getPasswordBox() {
     VBox passwordBox = new VBox();
     passwordBox.setMaxWidth(300);
-    PasswordField passwordField = new PasswordField();
+    passwordField = new PasswordField();
     passwordField.setMaxWidth(300);
     passwordBox.getChildren().addAll(new Label("Password"), passwordField);
     return passwordBox;
@@ -68,6 +93,7 @@ private Button getLoginBtn() {
     Button loginBtn = new Button("Log In");
     loginBtn.setMaxWidth(300);
     loginBtn.setId("login-btn");
+    loginBtn.setOnMouseClicked(e -> controller.handleLoginBtn());
     return loginBtn;
   }
   public Button getRegisterBtn() {
diff --git a/src/main/java/edu/group5/app/view/loginpage/SignInPageView.java b/src/main/java/edu/group5/app/view/loginpage/SignInPageView.java
index 1c5ddae..6ee0e9b 100644
--- a/src/main/java/edu/group5/app/view/loginpage/SignInPageView.java
+++ b/src/main/java/edu/group5/app/view/loginpage/SignInPageView.java
@@ -14,9 +14,15 @@
 
 public class SignInPageView extends BorderPane {
   private final SignInPageController controller;
+  private TextField nameField;
+  private TextField surnameField;
+  private TextField emailField;
+  private PasswordField passwordField;
+  private Label errorLabel;
 
   public SignInPageView(SignInPageController signInPageController) {
     this.controller = signInPageController;
+    this.controller.setView(this);
     setTop(new LoginHeader());
 
     HBox content = new HBox();
@@ -32,6 +38,29 @@ public SignInPageView(SignInPageController signInPageController) {
     setCenter(content);
 
   }
+
+
+  public String getFirstName() {
+    return nameField.getText();
+  }
+
+  public String getLastName() {
+    return surnameField.getText();
+  }
+
+  public String getEmail() {
+    return emailField.getText();
+  }
+
+  public char[] getPassword() {
+    return passwordField.getText().toCharArray();
+  }
+
+  public void showError(String message) {
+    errorLabel.setText(message);
+    errorLabel.setStyle("-fx-text-fill: red;");
+  }
+
   private VBox getOuterSection() {
     VBox outerSection = new VBox(12);
     outerSection.setAlignment(Pos.CENTER);
@@ -43,21 +72,28 @@ private VBox getSignInBox() {
     VBox signInSection = new VBox(12);
     signInSection.setAlignment(Pos.CENTER);
     signInSection.setId("login-box");
-    signInSection.getChildren().addAll(getNameRow(), getEmailBox(), getPasswordBox(), getSignInBtn());
+    signInSection.getChildren().addAll(getErrorLabel(), getNameRow(), getEmailBox(), getPasswordBox(), getSignInBtn());
     return signInSection;
   }
+
+  private Label getErrorLabel() {
+    errorLabel = new Label();
+    errorLabel.setPrefHeight(20);
+    return errorLabel;
+  }
+
   private HBox getNameRow() {
     HBox nameRow = new HBox(12);
     nameRow.setMaxWidth(300);
 
     VBox nameBox = new VBox();
-    TextField nameField = new TextField();
+    nameField = new TextField();
     nameField.setPromptText("Jinwoo");
     HBox.setHgrow(nameBox, Priority.ALWAYS);
     nameBox.getChildren().addAll(new Label("First name"), nameField);
 
     VBox surnameBox = new VBox();
-    TextField surnameField = new TextField();
+    surnameField = new TextField();
     surnameField.setPromptText("Son");
     HBox.setHgrow(surnameBox, Priority.ALWAYS);
     surnameBox.getChildren().addAll(new Label("Last Name"), surnameField);
@@ -69,7 +105,7 @@ private HBox getNameRow() {
   private VBox getEmailBox() {
     VBox emailBox = new VBox();
     emailBox.setMaxWidth(300);
-    TextField emailField = new TextField();
+    emailField = new TextField();
     emailField.setPromptText("aurafarmer@gmail.com");
     emailField.setMaxWidth(300);
     emailBox.getChildren().addAll(new Label("Email"), emailField);
@@ -78,7 +114,7 @@ private VBox getEmailBox() {
   private VBox getPasswordBox() {
     VBox passwordBox = new VBox();
     passwordBox.setMaxWidth(300);
-    PasswordField passwordField = new PasswordField();
+    passwordField = new PasswordField();
     passwordField.setMaxWidth(300);
     passwordBox.getChildren().addAll(new Label("Password"), passwordField);
     return passwordBox;
diff --git a/src/main/java/edu/group5/app/view/organizationpage/OrganizationPageView.java b/src/main/java/edu/group5/app/view/organizationpage/OrganizationPageView.java
index 4155ccd..4ec7c91 100644
--- a/src/main/java/edu/group5/app/view/organizationpage/OrganizationPageView.java
+++ b/src/main/java/edu/group5/app/view/organizationpage/OrganizationPageView.java
@@ -1,7 +1,9 @@
 package edu.group5.app.view.organizationpage;
 
 import edu.group5.app.control.HeaderController;
+import edu.group5.app.control.MainController;
 import edu.group5.app.control.OrganizationPageController;
+import edu.group5.app.model.organization.Organization;
 import edu.group5.app.view.Header;
 import javafx.geometry.Pos;
 import javafx.scene.control.Button;
@@ -17,9 +19,11 @@
 
 public class OrganizationPageView extends BorderPane {
   private final OrganizationPageController controller;
+  private final MainController mainController;
 
-  public OrganizationPageView(OrganizationPageController controller, HeaderController headerController) {
+  public OrganizationPageView(OrganizationPageController controller, HeaderController headerController, MainController mainController) {
     this.controller = controller;
+    this.mainController = mainController;
     getStylesheets().add(getClass().getResource("/organizationpage/organizationpage.css").toExternalForm());
     Header headerView = new Header(headerController);
     setTop(headerView);
@@ -58,8 +62,11 @@ private StackPane createImageContainer() {
     imageContainer.setPrefWidth(120);
     imageContainer.setMaxWidth(Double.MAX_VALUE);
 
+    Organization org = mainController.getCurrentOrganization();
+    String imagePath = org != null ? "/browsepage/images/children_of_shambala.png" : "/browsepage/images/children_of_shambala.png";
+
     ImageView logo = new ImageView(
-        new Image(getClass().getResource("/browsepage/images/children_of_shambala.png").toExternalForm())
+        new Image(getClass().getResource(imagePath).toExternalForm())
     );
 
     logo.setId("logo");
@@ -71,15 +78,17 @@ private StackPane createImageContainer() {
   }
 
   private VBox createOrgInfoSection() {
+    Organization org = mainController.getCurrentOrganization();
+
     VBox orgInfoSection = new VBox();
     orgInfoSection.setSpacing(50);
 
     VBox orgNameAndDescription = new VBox();
 
-    Label orgName = new Label("Shambala Foundation");
+    Label orgName = new Label(org != null ? org.name() : "Unknown Organization");
     orgName.setId("orgName");
 
-    Text description = new Text("Descriptive text");
+    Text description = new Text(org != null ? org.description() : "No description available");
     description.setId("description");
 
     orgNameAndDescription.getChildren().addAll(orgName, description);
diff --git a/src/main/java/edu/group5/app/view/userpage/UserPageView.java b/src/main/java/edu/group5/app/view/userpage/UserPageView.java
index 547b812..9ab73ee 100644
--- a/src/main/java/edu/group5/app/view/userpage/UserPageView.java
+++ b/src/main/java/edu/group5/app/view/userpage/UserPageView.java
@@ -1,25 +1,35 @@
 package edu.group5.app.view.userpage;
 
 import edu.group5.app.control.HeaderController;
-import edu.group5.app.model.user.Customer;
+import edu.group5.app.control.MainController;
+import edu.group5.app.model.donation.Donation;
+import edu.group5.app.model.organization.Organization;
+import edu.group5.app.model.user.User;
 import edu.group5.app.view.Header;
 import javafx.geometry.Insets;
 import javafx.geometry.Pos;
+import javafx.scene.control.Button;
 import javafx.scene.control.Label;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.BorderPane;
 import javafx.scene.layout.HBox;
-import javafx.scene.layout.Pane;
 import javafx.scene.layout.VBox;
 import javafx.scene.text.Text;
 
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+
 
 public class UserPageView extends BorderPane {
-  private final Customer customer;
+  private final User currentUser;
+  private final MainController mainController;
+
+  public UserPageView(HeaderController headerController, MainController mainController) {
+    this.mainController = mainController;
+    this.currentUser = mainController.getCurrentUser();
 
-  public UserPageView(HeaderController headerController, Customer customer) {
-    this.customer = customer;
     getStylesheets().add(getClass().getResource("/userpage/userpage.css").toExternalForm());
 
     Header headerView = new Header(headerController);
@@ -30,6 +40,7 @@ public UserPageView(HeaderController headerController, Customer customer) {
     content.getChildren().addAll(createProfileSection(), createCausesSection(), createDonationsSection());
     setCenter(content);
   }
+
   private HBox createProfileSection() {
     ImageView avatar = new ImageView(new Image(getClass().getResourceAsStream("/userpage/account_circle.png")));
     avatar.setFitWidth(150);
@@ -37,39 +48,89 @@ private HBox createProfileSection() {
     avatar.setPreserveRatio(true);
     avatar.setId("avatar");
 
-    Text name = new Text(customer.getFirstName() + " " + customer.getLastName());
+    Text name = new Text(currentUser.getFirstName() + " " + currentUser.getLastName());
     name.setId("profile-name");
 
-    Label email = new Label(customer.getEmail());
+    Label email = new Label(currentUser.getEmail());
     email.getStyleClass().add("profile-info");
 
     Label location = new Label("Trondheim, Norway");
     location.getStyleClass().add("profile-info");
 
-    VBox info = new VBox(10, name, email, location);
+    Button logoutBtn = new Button("Logout");
+    logoutBtn.getStyleClass().add("logout-button");
+    logoutBtn.setOnAction(e -> mainController.logout());
+
+    VBox info = new VBox(10, name, email, location, logoutBtn);
     info.setAlignment(Pos.CENTER_LEFT);
 
     HBox profile = new HBox(40, avatar, info);
     profile.setAlignment(Pos.CENTER_LEFT);
     return profile;
   }
+
   private VBox createCausesSection() {
     Text title = new Text("YOUR SUPPORTED CAUSES");
     title.getStyleClass().add("section-title");
 
-    Pane causesPlaceholder = new Pane();
-    causesPlaceholder.getStyleClass().add("section-box");
-
-    return new VBox(10, title, causesPlaceholder);
+    VBox causesBox = new VBox(10);
+    causesBox.getStyleClass().add("section-box");
+    causesBox.setPadding(new Insets(10));
+
+    HashMap<Integer, Donation> userDonations = mainController.getDonationService()
+        .getDonationRepository().filterByUser(currentUser.getUserId());
+
+    Set<Integer> uniqueOrgs = new HashSet<>();
+    for (Donation donation : userDonations.values()) {
+      uniqueOrgs.add(donation.organizationId());
+    }
+
+    if (uniqueOrgs.isEmpty()) {
+      Label noCauses = new Label("No causes supported yet");
+      noCauses.setStyle("-fx-text-fill: #999;");
+      causesBox.getChildren().add(noCauses);
+    } else {
+      for (int orgId : uniqueOrgs) {
+        Organization org = mainController.getOrganizationService().findByOrgNumber(orgId);
+        if (org != null) {
+          Label causeLabel = new Label("• " + org.name());
+          causesBox.getChildren().add(causeLabel);
+        }
+      }
+    }
+
+    return new VBox(10, title, causesBox);
   }
+
   private VBox createDonationsSection() {
     Text title = new Text("PREVIOUS DONATIONS");
     title.getStyleClass().add("section-title");
 
-    Pane donationsPlaceholder = new Pane();
-    donationsPlaceholder.getStyleClass().add("section-box");
-
-    return new VBox(10, title, donationsPlaceholder);
+    VBox donationsBox = new VBox(10);
+    donationsBox.getStyleClass().add("section-box");
+    donationsBox.setPadding(new Insets(10));
+
+    HashMap<Integer, Donation> userDonations = mainController.getDonationService()
+        .getDonationRepository().filterByUser(currentUser.getUserId());
+
+    if (userDonations.isEmpty()) {
+      Label noDonations = new Label("No donations yet");
+      noDonations.setStyle("-fx-text-fill: #999;");
+      donationsBox.getChildren().add(noDonations);
+    } else {
+      for (Donation donation : userDonations.values()) {
+        Organization org = mainController.getOrganizationService()
+            .findByOrgNumber(donation.organizationId());
+        String orgName = (org != null) ? org.name() : "Unknown Organization";
+
+        Label donationLabel = new Label(
+            orgName + " • " + donation.amount() + " kr" + " • " + donation.date()
+        );
+        donationsBox.getChildren().add(donationLabel);
+      }
+    }
+
+    return new VBox(10, title, donationsBox);
   }
 
 }
diff --git a/src/main/resources/browsepage/browse_org.css b/src/main/resources/browsepage/browse_org.css
index 96ce14e..9a50c71 100644
--- a/src/main/resources/browsepage/browse_org.css
+++ b/src/main/resources/browsepage/browse_org.css
@@ -3,7 +3,6 @@
     -fx-border-width: 1px;
     -fx-border-radius: 1em;
     -fx-padding: 5px;
-    -fx-pref-width: 10px;
     -fx-background-color: white;
     -fx-background-radius: 1em;
 }
@@ -20,6 +19,7 @@
 #orgName {
     -fx-font-size: x-large;
     -fx-font-weight: bold;
+    -fx-text-alignment: center;
 }
 
 #checkMarkContainer {}
\ No newline at end of file
diff --git a/src/main/resources/userpage/userpage.css b/src/main/resources/userpage/userpage.css
index 6253079..8401a77 100644
--- a/src/main/resources/userpage/userpage.css
+++ b/src/main/resources/userpage/userpage.css
@@ -16,4 +16,16 @@
     -fx-pref-height: 120px;
     -fx-pref-width: 700px;
     -fx-background-radius: 6;
+}
+.logout-button {
+    -fx-background-color: #e03030;
+    -fx-text-fill: white;
+    -fx-font-size: 14px;
+    -fx-font-weight: bold;
+    -fx-padding: 8 20;
+    -fx-background-radius: 4;
+    -fx-cursor: hand;
+}
+.logout-button:hover {
+    -fx-background-color: #c02020;
 }
\ No newline at end of file
diff --git a/src/test/java/edu/group5/app/control/wrapper/DbWrapperDonationsTest.java b/src/test/java/edu/group5/app/control/wrapper/DbWrapperDonationsTest.java
index f31d57c..8c401c4 100644
--- a/src/test/java/edu/group5/app/control/wrapper/DbWrapperDonationsTest.java
+++ b/src/test/java/edu/group5/app/control/wrapper/DbWrapperDonationsTest.java
@@ -196,4 +196,12 @@ public void addingDonationListWithNullInRowThrowsExpectedException() {
     assertTrue(this.db.disconnect());
     assertEquals("One or more rows in data contains null values", exception.getMessage());
   }
+
+  @Test
+  public void dataIsEmptyAfterExportingAndImportingEmptyList() {
+    assertTrue(this.db.importDonations((int) this.users.get(0)[0]).size() == 0);
+    assertEquals(0, this.db.exportDonations(new ArrayList<Object[]>()));
+    assertTrue(this.db.importDonations((int) this.users.get(0)[0]).size() == 0);
+    assertTrue(this.db.disconnect());
+  }
 }
diff --git a/src/test/java/edu/group5/app/model/donation/DonationRepositoryTest.java b/src/test/java/edu/group5/app/model/donation/DonationRepositoryTest.java
index bdf0110..ce81b2a 100644
--- a/src/test/java/edu/group5/app/model/donation/DonationRepositoryTest.java
+++ b/src/test/java/edu/group5/app/model/donation/DonationRepositoryTest.java
@@ -263,4 +263,13 @@ void filterByUserIdThrowsIfNegative() {
             () -> repo.filterByUser(0));
     assertEquals("User ID must be positive", ex.getMessage());
   }
+
+  @Test
+  void exportExportsOnlyNewInformation() {
+    repo.addContent(donation1);
+    repo.addContent(donation2);
+    assertEquals(2, repo.export().size());
+    repo.addContent(donation3);
+    assertEquals(1, repo.export().size());
+  }
 }
\ No newline at end of file
diff --git a/src/test/java/edu/group5/app/model/organization/OrganizationServiceTest.java b/src/test/java/edu/group5/app/model/organization/OrganizationServiceTest.java
new file mode 100644
index 0000000..e34aba7
--- /dev/null
+++ b/src/test/java/edu/group5/app/model/organization/OrganizationServiceTest.java
@@ -0,0 +1,70 @@
+package edu.group5.app.model.organization;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeEach;
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class OrganizationServiceTest {
+  private OrganizationRepository repo;
+  private OrganizationService service;
+  private Object[] content;
+
+  @BeforeEach
+  public void setUp() {
+    Map<String, Object> orgMap = new HashMap<>();
+    orgMap.put("org_number", "1");
+    orgMap.put("name", "Misjonsalliansen");
+    orgMap.put("status", "approved");
+    orgMap.put("url", "https://www.innsamlingskontrollen.no/organisasjoner/misjonsalliansen/");
+    orgMap.put("is_pre_approved", false);
+
+    content = new Object[]{orgMap};
+    repo = new OrganizationRepository(content);
+    service = new OrganizationService(repo);
+  }
+
+  @Test
+  void constructor_throwsIfNull() {
+    IllegalArgumentException ex = assertThrows(IllegalArgumentException.class,
+        () -> new OrganizationService(null));
+    assertEquals("OrganizationRepository cannot be null", ex.getMessage());
+  }
+
+  @Test
+  void testGetOrganizationRepository() {
+    assertEquals(repo, service.getOrganizationRepository());
+  }
+
+  @Test
+  void testGetTrustedOrganizations() {
+    Map<Integer, Organization> trustedOrgs = service.getTrustedOrganizations();
+    assertNotNull(trustedOrgs);
+    assertTrue(trustedOrgs.containsKey(1));
+    Organization org = trustedOrgs.get(1);
+    assertEquals(1, org.orgNumber());
+    assertEquals("Misjonsalliansen", org.name());
+    assertTrue(org.trusted());
+    assertEquals("https://www.innsamlingskontrollen.no/organisasjoner/misjonsalliansen/", org.websiteUrl());
+    assertFalse(org.isPreApproved());
+  }
+
+  @Test
+  void testFindByOrgNumber() {
+    Organization org = service.findByOrgNumber(1);
+    assertNotNull(org);
+    assertEquals(1, org.orgNumber());
+    assertEquals("Misjonsalliansen", org.name());
+  }
+
+
+  @Test
+  void testFindByOrgName() {
+    Organization org = service.findByOrgName("Misjonsalliansen");
+    assertNotNull(org);
+    assertEquals(1, org.orgNumber());
+    assertEquals("Misjonsalliansen", org.name());
+  }
+}
diff --git a/src/test/java/edu/group5/app/model/user/UserRepositoryTest.java b/src/test/java/edu/group5/app/model/user/UserRepositoryTest.java
index 0700828..a4afbc8 100644
--- a/src/test/java/edu/group5/app/model/user/UserRepositoryTest.java
+++ b/src/test/java/edu/group5/app/model/user/UserRepositoryTest.java
@@ -12,6 +12,7 @@ public class UserRepositoryTest {
 
 private UserRepository repo;
 private List<Object[]> rows;
+private User additionalUser;
 
   @BeforeEach
   void setUp() {
@@ -19,6 +20,7 @@ void setUp() {
     rows.add(new Object[]{1, "Customer", "John", "Cena", "john@example.com", "hashedpass"});
     rows.add(new Object[]{2, "Customer", "Jane", "Doe", "jane@example.com", "hashedpass"});
     repo = new UserRepository(rows);
+    this.additionalUser = new Customer(3, "John", "Doe", "john@example.com", "hashedpass");
   }
 
   @Test
@@ -145,4 +147,11 @@ void exportContainsAllUsers() {
     assertEquals(2, exported.get(1)[0]);
     assertEquals("Customer", exported.get(0)[1]);
   }
+
+  @Test
+  void exportExportsOnlyNewInformation() {
+    assertEquals(0, repo.export().size());
+    repo.addContent(this.additionalUser);
+    assertEquals(1, repo.export().size());
+  }
 }
\ No newline at end of file
diff --git a/src/test/java/edu/group5/app/model/user/UserServiceTest.java b/src/test/java/edu/group5/app/model/user/UserServiceTest.java
index c6713d7..8f56957 100644
--- a/src/test/java/edu/group5/app/model/user/UserServiceTest.java
+++ b/src/test/java/edu/group5/app/model/user/UserServiceTest.java
@@ -17,7 +17,7 @@
 
 public class UserServiceTest {
   private UserRepository repo;
-    private UserService service;
+  private UserService service;
 
   @BeforeEach
   void setUp() {