title: Google sign in doesn't work after release of flutter app
body: <p>I developed a app with Flutter and tested on my device using the command: </p>
  
  <pre><code>flutter run --release
  </code></pre>
  
  <p>and everything worked fine.
  I also tried building the app with:</p>
  
  <pre><code>flutter build apk --release
  </code></pre>
  
  <p>and installing it manually, and still everything was ok.<br>
  I uploaded on the store, and now the login doesn't work anymore.
  I tried looking at the logcat and the error i get when i try to login is:</p>
  
  <pre><code>I/flutter: exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null)
  </code></pre>
  
  <p>I tried adding the appCompat dependency and I checked the the SHA1 keys, everything is in the right place, I can't figure out why when I download if from the store it doesn't work anymore.</p>