Flutter Projects

Adding the authentication logic

We'll place the authentication logic in a new class. This class will contain four methods:

• A method to log in
• A method to sign up
• A method to log out
• A method to retrieve the current user

Let's begin adding our login, as follows:

1. Create a new folder in the lib folder of our app and call it shared. Inside the shared folder, let's also create a new file called authentication.dart.
2. In this file, we'll import the firebase_auth package and async.dart.
3. Next, we'll create a new class called Authentication, as follows:

import 'dart:async';import 'package:firebase_auth/firebase_auth.dart';class Authentication {}

4. In the Authentication class, we'll declare an instance of FirebaseAuth, which is the object that enables ...