public async Task <bool> CheckLogin() { try { var username = Preferences.Get(AuthorizeConstants.UserKey, string.Empty); var password = Preferences.Get(AuthorizeConstants.PasswordKey, string.Empty); var response = await JongSnamServices.LoginWithHttpMessagesAsync(username, password); var userModel = await GetRespondDtoHandlerHttpStatus <UserModel>(response); if (userModel == null) { return(false); } else { Preferences.Clear(); // save access token Preferences.Set(AuthorizeConstants.UserIdKey, userModel.Id.ToString()); Preferences.Set(AuthorizeConstants.UserKey, userModel.Email); Preferences.Set(AuthorizeConstants.PasswordKey, userModel.Password); Preferences.Set(AuthorizeConstants.UserTypeKey, userModel.UserType); Preferences.Set(AuthorizeConstants.IsLoggedInKey, userModel.IsLoggedIn.ToString()); await Task.Delay(MillisecondsDelay); } return(true); } catch (Exception) { return(false); } }