public async Task <JObject> Login(UserSignDTO userSignDTO) { JObject responseJson = null; try { responseJson = await _authenticationService.AcquireAccessToken (_serverAddresses.Addresses.FirstOrDefault(), userSignDTO.Telephone, userSignDTO.Password); } catch (Exception ex) { this._logger.LogError("An exception occured,the exception message:" + ex.Message); } return(responseJson); }