Added new Constructro to logn model and started using the new constructor in UserService

src/main/java/NTNU/IDATT1002/models/Login.java

@@ -25,6 +25,10 @@ public class Login {
     public Login() {
     }
 
+    public Login(User user) {
+        this.username = user.getUsername();
+    }
+
     public Login(User user, String passwordSalt , String hash) {
         this.username = user.getUsername();
         this.user = user;

src/main/java/NTNU/IDATT1002/service/UserService.java

@@ -46,7 +46,7 @@ public class UserService {
      */
     public Optional<User> createUser(String email, String username, String firstName, String lastName, String callingCode, String phoneNumber, Date birthDate, String password) {
         User user = new User(username, email, firstName, lastName, callingCode, phoneNumber, birthDate);
-        Login login = new Login(user, "", "");
+        Login login = new Login(user);
         setPassword(login, password);
         return userRepository.save(user);
     }