What Android resource ids to give in Firebase Test Lab while testing Firebase Auth UI?

We want to test our android app in firebase test lab via firebase developer console. We have used Firebase auth UI to login to the app. However, we can't find username and password resource names from firebase auth UI library which we have integrated in app via gradle? I am required to provide Test account credentials as per this statement in console -

If your app requires custom login, enter the resource names of the login elements and the login credentials.

If we don't give above credentials, i think the test does not login into the app.In this case, test is not complete.

I am not sure whether it creates a new account or not.

The screen shot of console - Firebase console - Test Lab