Task done

Logic/UserService.cs

@@ -6,13 +6,19 @@ namespace Logic;
 public class UserService : IUserService
 {
     private IRepository repository;
+
+    public UserService(IRepository repository)
+    {
+        this.repository = repository;
+    }
+
     public User? Read()
     {
         return repository.Read();
     }
 
-    public void Create(string username, string email, string password)
+    public int Create(string username, string email, string password)
     {
-        repository.Write(new User(username, email, password));
+        return repository.Write(new User(username, email, password));
     }
 }