App fails to sign in

[extremevertigo]

I needed to use
"cordova plugin add cordova-plugin-play-games-services --variable APP_ID=<...> --variable ANDROID_PLAY_SERVICES_GAMES_VERSION=18.0.1"

In the device ready event I call.
" cordova.plugins.playGamesServices.auth(function() {
// On logged in
}, function() {
// On not logged in
});
"
When I open the app I get the google play icon at the top saying it is connecting to the google play service. Then a couple of seconds later I get a pop up window that I failed to sign in. I am not sure where to proceed from here on resolving this issue. Any tips or advise would be much appreciated.
Is this plugin still a reliable plugin to use?
I just want to be able to use google play leaderboards and achievements in my Cordova project. Thank you in advance :)

[extremevertigo]

This is the log from android studio in regards to it not working:
"W/ConnectionTracker: Exception thrown while unbinding
java.lang.IllegalArgumentException: Service not registered: ll@13a1b37
at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:1562)
at android.app.ContextImpl.unbindService(ContextImpl.java:1692)
at android.content.ContextWrapper.unbindService(ContextWrapper.java:717)
at ce.b(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):1)
at ce.a(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):5)
at lm.A(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):10)
at kx.a(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):3)
at dx.run(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):2)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:458)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at iv.run(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):15)"

[TheBosZ]

For me, I had to sign the debug APK using the keystore I linked in the Play Console.

After that, I was able to get SIGN_IN_SUCCESS