title: Delphi 10.1 Android How to get Firebase Device Token
body: <p>I have tried:</p>
  
  <pre><code>APushService := TPushServiceManager.Instance.GetServiceByName(TPushService.TServiceNames.GCM);
  APushService.AppProps[TPushService.TAppPropNames.GCMAppID] := '"mobilesdk_app_id" '; // my "mobilesdk_app_id" from google-services.json
  AServiceConnection := TPushServiceConnection.Create(APushService);
  AServiceConnection.Active := True;
  AServiceConnection.OnChange := OnServiceConnectionChange;
  AServiceConnection.OnReceiveNotification := OnReceiveNotificationEvent;
  
  ADeviceID := APushService.DeviceIDValue[TPushService.TDeviceIDNames.DeviceID];
  AdeviceToken := APushService.DeviceTokenValue[TPushService.TDeviceTokenNames.DeviceToken];
  </code></pre>
  
  <p><code>ADeviceID</code> comes up correctly, by <code>AdeviceToken</code> comes up blank. </p>