void AuthorizeUserCompleted(object sender, UserAuthEventArgs<AuthorizeResult> e)
 {
     if (e.Error != null)
         output(e.Error.Message);
     else
     {
         App.Credentials.AccessToken = e.Result.access_token;
         output("Auth completed OK, token=" + App.Credentials.AccessToken);
     }
 }
 void AuthorizeUserCompleted(object sender, UserAuthEventArgs <AuthorizeResult> e)
 {
     if (e.Error != null)
     {
         output(e.Error.Message);
     }
     else
     {
         App.Credentials.AccessToken = e.Result.access_token;
         output("Auth completed OK, token=" + App.Credentials.AccessToken);
     }
 }