A simple Python 3 script that will import users from a Laravel database to your Google Firebase project in batches of 100.

In order to import users to Firebase, each user instance must have a uniquely identifiable non-empty string with no more than 128 characters.

You will likely need to update your Laravel projects users table to include a firebase_uid field. As, by default, Laravel ensures your users emails are unique you can simply set the values to an md5 hash of the users email. See the below migration for an example:

<?php

use App\Models\User;
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up(): void
    {
        Schema::table('users', function (Blueprint $table) {
            $table->string('firebase_uid', 128)->after('id');
        });

        User::query()
            ->chunkById(100, function (Collection $users) {
                $users->each(function (User $user) {
                   $user->firebase_uid = md5($user->email);
                   $user->save();
                });
            });
    }
};

Firstly, head over to firebase.google.com and click "getting started" to create a new Firebase project.

Tip: you don't need Google Analytics.

Once you have created the project, click on the card for setting up Authentication and enable the Email/Password sign in provider in.

Next, head over to you Google Developer Service accounts page and create a new set of key credentials for your firebase project and download the generated JSON file, you will need this for later.

Copy the .env.example file to .env and make sure you've configured your database:

# Laravel database configuration
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=laravel
DB_USERNAME=root
DB_PASSWORD=

Next, ensure you've configured firebase correctly, but setting the following keys.

# Google Firebase configuration
FIREBASE_APP_ID=
FIREBASE_API_KEY=
FIREBASE_PROJECT_ID=

You can find the values of these keys by heading to the Project Settings section of your Firebase project.

Finally, set the following keys from the JSON file you've just downloaded:

# Google Service Account Credentials
GOOGLE_SERVICE_ACCOUNT_PROJECT_ID=
GOOGLE_SERVICE_ACCOUNT_PRIVATE_ID=
GOOGLE_SERVICE_ACCOUNT_PRIVATE_KEY=
GOOGLE_SERVICE_ACCOUNT_CLIENT_EMAIL=
GOOGLE_SERVICE_ACCOUNT_CLIENT_ID=
GOOGLE_SERVICE_ACCOUNT_AUTH_URL=
GOOGLE_SERVICE_ACCOUNT_TOKEN_URL=
GOOGLE_SERVICE_ACCOUNT_AUTH_PROVIDER_CERT_URL=
GOOGLE_SERVICE_ACCOUNT_CLIENT_CERT_URL=

By default, Laravel hashes users passwords using the bcrypt hashing algorithm. If you have changed this, you may edit the get_hash_alg method found in ./src/config/hashing.py to suit your needs.

Currently supported hashing algorithms:

• hmac_sha512
• hmac_sha256
• hmac_sha1
• hmac_md5
• md5
• sha1
• sha256
• sha512
• pbkdf_sha1
• pbkdf2_sha256
• scrypt
• bcrypt
• standard_scrypt