public async Task<bool> RegisterAsync(string name, string userName, string password, string confirmPassword) { var success = false; if (await userDataService.UserNameExistsAsync(userName)) throw new Exception("User exists."); IPasswordHasher hasher = new PasswordHasher(); var passwordhash = hasher.HashPassword(password); if (password == confirmPassword) { var user = new User() { Name = name, UserName = userName, PasswordHash = passwordhash, }; var createdUser = await userDataService.CreateAsync(user); success = createdUser != null; } return success; }