title: Signing apps which are already signed via Google Play Signing locally
body: <p>Currently, I'm programming a game for Android. I already published some first beta versions of it on the Google Play Store and signed it there via the Google Play App Signing. Now I want to integrate the Google Play Games Service into the app. For that, I used again the Google Play Console to create some leaderboards etc.</p>
  
  <p>I set up all the configuration in the app, for example, the signing via Google Play Games. Now when I try the app, I can not test the signing while I'm in the debug or release APK, which was generated by my computer.</p>
  
  <p>Now my question is, how can I sign the app with the App Signing Key stored in the Google Play Console to test the Google Play Games Services without having to upload the app every time?</p>
  
  <p>Thank you in advance.</p>