Helpful async/await for AWS

helpfulasyncaws.js

// get a JSON file from S3 and immediately parse the JSON to a JS object
const testObj = JSON.parse(await s3.getObject({ Bucket: 'test', Key: test }).promise().then(res => res.Body.toString()));

// get all keys from an S3 listObjectV2 as an array (assuming no pagination of results)
const keysArr = (await s3.listObjectsV2({Bucket: 'test', Prefix: 'test'}).promise().then(res => res.Contents)).map(item => item.Key);