I curiously enabled App Signing in our app, and I found that the problems it created is more than it saved...
First I need to go to Google API to manually change the "Signing-certificate fingerprint" as said in here, and I have to uninstall and install again everytime I want to switch between testing and published build, because the signature is different.
Most annoying thing is, I cannot test Game Services in my testing build! It always failed in authentication. I have to upload it to beta, update from Google Play then so the signature is right and able to login:
SignInFailureReason(serviceErrorCode:SIGN_IN_REQUIRED(4),activityResultCode:SIGN_IN_FAILED)
I've already added the SHA1 for the upload keystore but it doesn't help...
Is there anyway to bypass this?!