Login Page Flutter Github

Log in here

I am a huge enthusiast of Flutter and I am enamored with the way it streamlines the creation of cross-platform mobile apps. When it comes to incorporating authentication into a Flutter app, a standout choice is to utilize the GitHub login page. In this article, I will provide you with a step-by-step walkthrough of how to set up a login page in Flutter that verifies users through their GitHub accounts.

Getting Started

Before we dive into the details, make sure you have Flutter installed on your machine and a basic understanding of how Flutter works. If you’re new to Flutter, I highly recommend checking out the official Flutter documentation and completing the Flutter installation process.

Setting Up the Login Page

To start, create a new Flutter project or open an existing one. Next, we’ll add the necessary dependencies to our project’s pubspec.yaml file. Open the pubspec.yaml file and add the following lines:

dependencies:
firebase_auth: ^0.20.1
flutter_web_auth: ^0.6.0

The firebase_auth package will help us with user authentication, while the flutter_web_auth package will handle the authentication flow with GitHub.

Next, import the dependencies in your Dart file:

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

Now, let’s create the login page UI. You can design your own login page or use Flutter’s built-in widgets to create a simple and clean layout. Don’t forget to add text fields for the user to enter their GitHub username and password.

Once the UI is set up, we can move on to the authentication process.

Authenticating with GitHub

To authenticate users with their GitHub accounts, we’ll use the OAuth 2.0 protocol. This allows users to authorize our Flutter app to access their GitHub account without exposing their login credentials.

Let’s implement the authentication process:

Future authenticateWithGitHub() async {
final result = await FlutterWebAuth.authenticate(
url: 'https://github.com/login/oauth/authorize?client_id=YOUR_CLIENT_ID&redirect_uri=YOUR_REDIRECT_URI',
callbackUrlScheme: 'YOUR_CALLBACK_URL_SCHEME',
);

// Use the access token to sign in or create a user in your Firebase project
await signInOrCreateUserWithGitHub(accessToken);
}

In the authenticateWithGitHub() function, we use the flutter_web_auth package to open the GitHub login page in a web view. After the user successfully logs in, GitHub redirects back to our app with an authorization code. We then exchange this code for an access token, which we can use to authenticate the user with Firebase or any other backend service.

Note: Replace YOUR_CLIENT_ID, YOUR_REDIRECT_URI, and YOUR_CALLBACK_URL_SCHEME with your own values. You can obtain these values by creating a new OAuth application in your GitHub account settings.

Conclusion

Implementing a login page in a Flutter app that authenticates users using their GitHub accounts is a powerful and secure way to handle user authentication. By integrating with GitHub, you can leverage their robust authentication system and save time and effort in developing your own login system.

In this article, we covered the basics of setting up a login page in Flutter and authenticating with GitHub. I hope you found this guide helpful and that it inspires you to build amazing user experiences with Flutter and GitHub.

Happy coding!