Example using firebase-admin in SK

firebaseAdmin.js

import admin from "firebase-admin";

if (!admin.apps.length) {
  admin.initializeApp({
    credential: admin.credential.applicationDefault(),
    databaseURL: 'your-url' // ...
  });
};

const firebase = admin;
const firestore = admin.firestore();
const auth = admin.auth();
const storage = admin.storage();

export { firebase, firestore, auth, storage };