example.js

const admin = require('firebase-admin');

admin.initializeApp({
  databaseURL: process.env.FIREBASE_URI,
  credential: admin.credential.cert({
    projectId: 'angular-stacker-123723',
    clientEmail: 'firebase-adminsdk-xlnkn@angular-stacker-123723.iam.gserviceaccount.com',
    privateKey: process.env.FIREBASE_KEY
  })
})

admin.auth().getUser('pr8bDN4d36TORjAbW7b7hAgt6I53')
  .then(profile => {
    console.log(profile);
  })
  .catch(err => {
    console.log(err);
  });