Skipped x frames! The application may be doing too much work on its main thread. What does this error signify and how to solve this?

Question

I'm trying to do authentication with firbase in my Flutter app. Once the user is signed in and goes to the Authenticted screen, this error shows up. I'm using google_signin plugin with simple logics.

    bool isAuth = false;

  //check if the user is signed in
  @override
  void initState() {
    super.initState();
    googleSignIn.onCurrentUserChanged.listen((account) {
      handleSignIn(account);
    }, onError: (err) {
      print("Error signing in: $err");
    });
    //maintain the signin
    googleSignIn.signInSilently(suppressErrors: false).then((account) {
      handleSignIn(account);
    }).catchError((err) {
      print("Error signing in: $err");
    });
  }

  handleSignIn(GoogleSignInAccount account) {
    if (account != null) {
      print('User signed in!: $account');
      setState(() {
        isAuth = true;
      });
    } else {
      setState(() {
        isAuth = false;
      });
    }
  }

  //sign in using google
  login() {
    googleSignIn.signIn();
  }

  logout() {
    googleSignIn.signOut();
  }

  Widget buildAuthScreen() {
    return Center(
      child: RaisedButton(
        child: Text("LogOut"),
        onPressed: logout(),
      ),
    );
  }

then the unauth screen has basic login layout for signining in...