Firebase server side token validation

fb_token_ss_val.js

const firebaseAdmin = require('firebase-admin');
const token = 'token_complete';
console.log('Initializing app');

firebaseAdmin.initializeApp({
  credential: firebaseAdmin.credential.applicationDefault(),
  databaseURL: 'https://project-default-rtdb.firebaseio.com'
});

console.log('To verify');

firebaseAdmin
  .auth()
  .verifyIdToken(token)
  .then(decodedToken => {
    console.log('success');
    console.log(decodedToken);
    console.log(decodedToken.uid);
  })
  .catch(err => {
    console.log('error');
    console.log(err);
  });