Go to https://console.firebase.google.com.
Enter name of your Android application.
Enter the Android package name (Bundle ID) of your application, it should be same for Android and iOS.
Click Download google-services.json file and submit the file in a private case here.
Copy the Server key and include it in your private case.
If you missed to download the google-services.json file at the first place, you can download it from Project Settings.
is requesting access to a wiki that you have locked: https://my.axerosolutions.com/spaces/5/communifire-documentation/wiki/view/31025/how-to-create-firebase-project