title: How to debug Android app with Play services
body: <p>I wish to link my Android game to Google Play Games Services but I cannot figure out how to do it with a debug certificate. From what I know, I need to upload an apk to Google for internal testing, which will then create a test certificate to link my app to the services. But, if I launch the app on an emulator, I'm using the Android Studio debug certificate, which cannot be used to link apps. How then such app be debugged? Can a debug certificate be used to link the app after it's been uploaded to internal testing? What is the workflow in this case?</p>