Script to add users from firestore emulator data to auth emulator

setup-emulator-auth.js

const admin = require('firebase-admin');
const readline = require('readline');
// Use your project's admin service account JSON, or you can hardcode your project ID in admin.initializeApp below
const serviceAccount = require('./your-project-firebase-adminsdk-abcde-1234567890.json');

const rl = readline.createInterface({
	input: process.stdin,
	output: process.stdout,
});

admin.initializeApp({ projectId: serviceAccount.project_id });

// Function to put data in firebase auth from firestore
(async () => {
	const auth = admin.auth();
	const db = admin.firestore();

	const usersSnapshot = await db.collectionGroup('all_users').get();
	usersSnapshot.forEach(async (doc) => {
		const data = doc.data();

		if (data.email) {
			console.log(`Auto creating user ${data.name} with email ${data.email} in auth emulator`);
			await auth.createUser({
				uid: data.uid,
				email: data.email,
				password: '123456',
				displayName: data.name,
				emailVerified: data.is_email_verified,
			});
      // Optional, if you're setting custom user claims in your case
			await auth.setCustomUserClaims(data.uid, { is_admin: data.is_admin });
		}
	});
	// Used to keep firebase emulator alive
	rl.question('Press CTRL+C to shit down emulator', () => { });
})();