Right after yesterday&#39;s Google I/O keynote I&#39;ve updated my Android SDK to integrate the game services into one of my apps.

Things I&#39;ve done so far:

 1. added and linked my app in the Dev Console (game services)
 2. included the OAuth client id into my app/manifest
 3. added `BaseGameActivity` and `GameHelper` to my project ([from GitHub][1])
 4. added the google-play-services library to my project
 5. extended `BaseGameActivity`, added a `com.google.android.gms.common.SignInButton`

I&#39;ve also set up game meta data and, of course, some achievements. The dev console states that it is ready to release. To test the login flow and achievements, I&#39;ve added two Google+ accounts as test users.

But when I test the SignInButton, an alert pops up: _Unknown error_. Here&#39;s the logcat:

    ERROR/Volley: il.a: Unexpected response code 403 for https://www.googleapis.com/games/v1/players/me
    ERROR/SignInIntentService: Access Not Configured
    ERROR/LoadSelfFragment: Unable to sign in - application does not have a registered client ID

I&#39;ve built my application in production mode - using ProGuard and the right certificate.

Did I miss something?

### Update - some more attempts ###

Here&#39;s a short overview about what I&#39;ve tried in the meantime. Nothing helped.

 - remove and recreate the linked Android app entry (double checked certificate fingerprint)
 - disable anti-piracy
 - skip proguard
 - create a new (test) game and use its client id

The problem is not related to the _accounts for testing_ section. Using an account which is not enabled for testing will lead to another error message:

    E/GameAgent: Unable to retrieve 1P application 547xxxxxx457 from network
    E/CheckGameplayAcl: Unable to load metadata for game

## Solution by Hartok! ##

Hartok&#39;s solution helped me a lot to fix this issue. I&#39;ve never visited the [Google APIs Console][2] before. It&#39;s important to know, that the OAuth Client ID is not deleted when you remove a linked app from your game or even delete a game (in the Dev Console). You have to visit the APIs Console and remove it manually.

The auto-selected SHA1 fingerprint is (always) wrong! You have to lookup your own:

    keytool -exportcert -alias &lt;your-alias&gt; -keystore &lt;path-to-keystore&gt; -list -v

The new client id of my (correctly) linked app looked like `89xxxxxxxx73-2u6mXXXXXXXXXXXXXXXXXXX8903.apps.goo...`, not just 12 digits as before. I finally figured out that you have to exclude the dash and alphanumeric stuff and have to use the 12 digits only.


  [1]: https://github.com/playgameservices/android-samples/blob/master/BaseGameUtils
  [2]: https://code.google.com/apis/console/

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Google Play Game Services - unable to sign in