Markdium-Simple Firebase Login Flow in Flutter

Markdium-Dart.dart

import 'package:firebase_auth/firebase_auth.dart';
import 'dart:async';

class AuthService {
  final FirebaseAuth _auth = FirebaseAuth.instance;

  // return the Future with firebase user if one exists
  Future get getUser => _auth.currentUser();

  // wrapping the firebase calls
  Future logout() {
    return FirebaseAuth.instance.signOut();
  }

  // wrapping the firebase calls
  Future createUser(
      {String firstName,
      String lastName,
      String email,
      String password}) async {
    var u = await FirebaseAuth.instance
        .createUserWithEmailAndPassword(email: email, password: password);

    UserUpdateInfo info = UserUpdateInfo();
    info.displayName = '$firstName $lastName';
    return await u.updateProfile(info);
  }

  // wrapping the firebase calls
  Future loginUser({String email, String password}) {
    return FirebaseAuth.instance
        .signInWithEmailAndPassword(email: email, password: password);
  }
}