Can't Sign In Goolge Play Game Services: Must Have A Game Id To Sign In

I am trying to integrate Google Play Game Services but can't sign in. I know some developers ask about this problem before but the problem is nobody asked about the error I am enco

Solution 1:

I came across problem with same output - I downgraded version of com.google.android.gms:play-services-(base/games/auth) to 16.0.0 and got better error log:

019-10-24 11:52:03.266 25880-12410/? E/ValidateServiceOp: ******** APP ID IS NOT CORRECTLY CONFIGURED TO USE GOOGLE PLAY GAME SERVICES
**** Specify it using @string resources value or \u003 followed by an app_id value.
**** For example:
****   meta-data android:name="com.google.android.gms.games.APP_ID"
****             android:value="@string/app_id" />
**** or
****   meta-data android:name="com.google.android.gms.games.APP_ID"
****             android:value="\u003123456789" />

My manifest was like this:

android:name="com.google.android.gms.games.APP_ID"
****             android:value="3123456789" />

I had missing \u003 symbol. After replacing this with @string/app_id and putting value to strings.xml it started working. You added this string to ids.xml, which may be wrong.

After doing that I upgraded version of Google Play Services and everything works!