Resemble uses API keys to allow access to the API.
If you have an account, you can find your API key here.
If not, you're more than welcome to register here.
Authentication is as simple as including the following header in all your HTTP requests:
Authorization: Token token=YOUR_API_TOKEN
const Resemble = require('@resemble/node')
const resemble = new Resemble('v2', "YOUR_API_TOKEN")