simpleton.js

'use strict'

const { google } = require('googleapis')
const got = require('got')
const key = require('./auth.json')

async function loginWithJWT(){
  const scopes = 'https://www.googleapis.com/auth/photoslibrary.readonly';
  const jwt = new google.auth.JWT(key.client_email, null, key.private_key, scopes);
  console.log('performing login')
  try { return jwt.authorize(); }
  catch(error) { console.log('something went wrong with auth'); }
}

async function queryPhotos(response){
  console.log('querying photos');
  try {
    const api_call = await got('https://photoslibrary.googleapis.com/v1/mediaItems',
      { json: true, headers: { Authorization: response.token_type+' '+response.access_token } });
    return api_call.body;
  } catch(error){
    console.log('ruh oh');
    console.log(error.body);
  }
}

async function getMediaLibraryPhotos () {
  const auth = await loginWithJWT()
  console.log('logged in!',auth);
  const query = await queryPhotos(auth)
  console.log('queried photos!')
  console.log(query)
}

getMediaLibraryPhotos();