public IHttpActionResult RegisterNewUser([FromBody] UserRegistrationModel userRegistrationModel) { if (!ModelState.IsValid) { return(BadRequest(ModelState)); } CreateAccountRequest accountRequest; try { accountRequest = new CreateAccountRequest( userRegistrationModel.Password, new MailAddress(userRegistrationModel.Mail)); } catch (System.ArgumentException) { return(BadRequest("Fields must not be empty")); } int createdUserId; try { createdUserId = _userManager.CreateUser(accountRequest); } catch (AccountAlreadyExistsException ex) { return(Content(HttpStatusCode.Conflict, ex.Message)); } _mailingService.SetupEmailConfirmation(createdUserId); return(Ok(createdUserId)); }