Firebase Auth

If you're migrating to Celest from another framework, chances are you already have a user base that you'd like to use.

As of Celest V1, Firebase can be used as your auth provider in Celest. And doing so is just as easy as with Celest's built-in auth.

In your Celest project

To use Firebase as your auth provider, add the following code to your project.dart file:

celest/lib/src/project.dart

import 'package:celest/celest.dart';
 
const project = Project(name: 'firebase');
 
const auth = Auth(
  providers: [
    ExternalAuthProvider.firebase(),
  ],
);

Verifying users with Firebase requires knowing your Firebase project ID. When you run celest start, Celest will automatically search your environment for any available Firebase projects. If it can't figure out which project to use, you'll be prompted to enter it manually.

Celest will securely store your Firebase project ID for future use so it doesn't need to prompt you again.

In your Flutter app

In your Flutter app, Celest will listen for changes to Firebase's auth state and update the Celest state accordingly so that calls to your Cloud Functions are authenticated appropriately.

To do so, it needs access to your Firebase client, which you pass into the celest.init call in your main function.

lib/main.dart

import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:my_project_client/my_project_client.dart';
 
Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  celest.init(
    externalAuth: ExternalAuth.firebase(FirebaseAuth.instance),
  );
  runApp(const MyApp());
}

Using the Auth client Supabase Auth