public string Register([FromBody] RegistrationViewModel registrationViewModel) { try { if (ModelState.IsValid) { var user = _userDomainService.CreateUser(registrationViewModel); var userInfoModel = _userDomainService.GetUserInfoViewModel(registrationViewModel.Login, registrationViewModel.Password); return(JsonConvert.SerializeObject(this._getAuthorizationType(userInfoModel), new JsonSerializerSettings { Formatting = Formatting.Indented })); } else { List <ValidationViewModel> validationSummary = new List <ValidationViewModel>(); foreach (var field in ModelState.Keys) { var erorMessages = ModelState[field].Errors.Select(a => a.ErrorMessage); validationSummary.Add(new ValidationViewModel { ErrorsMessages = erorMessages.ToList(), FieldName = field }); } return(this._getAuthorizationTypeError(validationSummary: validationSummary)); } } catch (Exception ex) { return(this._getAuthorizationTypeError(ex.Message)); } }