public string CompleteOAuthFlow(AuthorizationParameters parameters)//AuthorizationParameters parameters) { try { DriveRestClient restClient = new DriveRestClient(AppConstants.GoogleDriveClientId, AppConstants.GoogleDriveClientSecret, googledriveRedirectUrl.ToString()); DriveToken token = restClient.GetTokenfromCode(parameters.Code); Storage.GoogleDrive.Token = token; return("OAuth succeeded"); } catch (Exception ex)// ActiveDirectoryAuthenticationException ex) { return("OAuth failed. " + ex.ToString()); } }