get current user doesnt work in emulator firebase code example

Example 1: angular install firebase tools

npm install -g firebase-tools

Example 2: npm firebase

npm i firebase

Example 3: how to check the current user in firebase android

@Override
public void onStart() {
    super.onStart();
    FirebaseUser currentUser = mAuth.getCurrentUser();
    if (currentUser == null) {
        // No user is signed in
    } else {
        // User logged in
    }
}