Android app bundle uploads create strange accounts (<characters>.<5 digits>@gmail.com) in Firebase Authentication

Question

I have an Android app using Flutter. The app backend is Firebase. Every time I upload an app bundle to Play Store Console, somebody (some system) creates strange user accounts in my Firebase project. They are strange because the email format is always <some characters>.<5 digits>@gmail.com, such as [email protected] and [email protected].

Here is the screenshot of the Firebase console showing the strange accounts in my development project. Google Play Store support tells me to talk to Firebase support. Firebase support said they cannot track the accounts creation.

Does anyone know why these accounts are created every time I submit my app to Play Store Console?

Answer 1

These emails are caused because of Google Play Console's Pre Launch Reports which run for each version of the app you submit.

These are robots that test your app and they use these emails to log in to it. Google does this to check the quality of your app and to see if it meets the Google Play policies.

Go to "Release" > "Testing" > "Pre-Launch Report". If you watch the videos there of the robots testing your app you will see they are using the strange email addresses to log in.