how to get user firebase flutter code example

Example 1: getting uid of user firebase flutter

final FirebaseUser user = await auth.currentUser();
final userid = user.uid;

Example 2: how to sign out user in flutter with firebase authentication

final FirebaseAuth _auth = FirebaseAuth.instance;

Future<void> _signOut() async {
    await _auth.signOut();
    await _googleSignIn.signOut();
  }