//FIXME: set credentials
const username = ''
const password = ''

//FIXME: set to firebase config JSON
const firebaseConfig = {}

const firebase = require('firebase')
firebase.initializeApp()
;(async () => {
  await firebase.auth().signInWithEmailAndPassword(username, password)
  let token = await firebase.auth().currentUser.refreshToken
  console.log(token)
})()