Ok Im getting tired of spamming repl talk with questions about Firebase. So basically everything is almost done but whenever I try to run my repl (I dont know if you can see it) this error pops up:
Error: 9 FAILED_PRECONDITION: The Cloud Firestore API is not available for Datastore Mode projects.
Anyone know whats going on? Here is the code:

const admin = require('firebase-admin');
const serviceAccount = require("./the_service_Account_Key.json")

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
  databaseURL: "the DB url"
});

const db = admin.firestore();

//The error is raised staring here
async function foo() {
const docRef = db.collection('users').doc('alovelace');
async function foo() {
await docRef.set({
  first: 'Ada',
  last: 'Lovelace',
  born: 1815
});
}
foo();

Anyone know whats going on??