Unknown user in my firebase user authentication (Flutter/firebase)

Question

I developed an app to test the google login feature using flutter and google authentication. The project is a closed project and only I have access to it. But recently I saw that there was a google sign in from an unknown Email ID. How did the user login without the build of my app? Has my account been hacked? What is going on?

Answer 1

To anyone still wondering about this:

If you provide a native google sign in and the registered email adresses look like this:

• [email protected]
• [email protected]
• [email protected]
• [email protected]
• [email protected]

they are probably test accounts used to generate Google Plays Pre-Launch reports. You can read about it in the Play Console Help here.

If your app has a sign-in screen and you want the crawler to test the sign-in process or the content behind it, you need to provide account credentials.

Note that you do not need to provide credentials if your app supports "Sign-in with Google,” which enables the crawler to log in automatically.