as google says when the app starts pops up gpgs sign in, since my app is for children and older ages is necessary a screen neutral age, i did it, but automatic sign in keeps triggerring, it is for unity android, google play games services plugin
i searched and find two questions about it, but both is about android native code not unity plugin
basically the version 11 that i was using is impossible, but version 10 is still possible to use demand sign in REFERENCE