registration returns token now

SurveyBackend/SurveyBackend.Services/Services/UserService.cs

@@ -19,6 +19,11 @@ public class UserService : IUserService
         return await _userRepository.GetUserByEmail(email) ?? throw new NotFoundException("Email not found");
     }
 
+    public async Task<bool> IsEmailTaken(string email)
+    {
+        return await _userRepository.GetUserByEmail(email) != null;
+    }
+
     public async Task CreateUserAsync(User user)
     {
         await _userRepository.AddAsync(user);