const { initializeApp } = require('firebase/app');
const { migrateFirestore } = require('firebase_migrate_now');
const { getFirestore, collection, getDocs } = require('firebase/firestore');

const firebaseConfig = {
... your firebase config
};
const app = initializeApp(firebaseConfig);
const db = getFirestore(app);
const userCollection = collection(db, 'user_data'); // Replace 'user_data' with your actual collection name
const outputPath = './data.csv';

async function fetchAndMigrateData() {
  try {
    const collections = await getDocs(userCollection);

    await migrateFirestore(collections.docs, outputPath);

    console.log('Firestore data migration completed successfully.');
  } catch (error) {
    console.error('Error:', error);
  }
}

fetchAndMigrateData();