const admin = require('firebase-admin'); const serviceAccount = require('../firebase-key.json'); // adjust path require('dotenv').config(); // Make sure this line is included admin.initializeApp({ credential: admin.credential.cert(serviceAccount), databaseURL: process.env.FIREBASE_DB_URL // This must not be undefined }); const db = admin.database(); const ref = db.ref('users'); module.exports = ref;