/// <summary>
 /// This is the click handler for the 'Authenticate' button.
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void AuthenticateButton_Click(object sender, RoutedEventArgs args)
 {
     try
     {
         authenticationContext.IssueCredentials(ConfigStore.UserName, ConfigStore.Password, ConfigStore.ExtraParameters, ConfigStore.MarkAsManualConnect);
         rootPage.NotifyUser("Issuing credentials succeeded", NotifyType.StatusMessage);
     }
     catch (Exception ex)
     {
         rootPage.NotifyUser(ex.ToString(), NotifyType.StatusMessage);
     }
     ClearAuthenticationToken();
 }