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Question

I am trying to make simple game with Google Play Games Services, but I failed to sign in to Google Play Games.

I get this error:

Answer 1

In my case,I only add a release client ID in Google Play Console. When I run my app by click button RUN in AS,the network connection error show.But when I run the apk generated by the signed,it work well. So, add a debug client id if you want to run your app inside AS.