How to use shared preferences to keep user logged in flutter?

Question

I want to keep the user logged in after the user successfully logsin in flutter. I am using a REST API to retrieve the user name and password of the user. But I want to save

Answer 1

Make sure WidgetFlutterBinding.ensureInitialized() is the first line of main()

import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter/material.dart';

Future main() async {
  WidgetsFlutterBinding.ensureInitialized();
  SharedPreferences prefs = await SharedPreferences.getInstance();
  bool login = prefs.getBool("login");
  print("login:" + login.toString());
  runApp(MaterialApp(home: login == null ? LoginPage(title: 'My App') : HomePage()));
}

class LoginPage extends StatelessWidget { ...