For these APIs the OAuth Authorization Grant Type is used.
To replicate this walkthrough, you need the following: client-id and client-secret. You get the client credentials when you register/order your app.
Make sure your callback url is set to https://localhost in you application settings.
A minimal example to authenticate with the API is given below (replace the client-id and client-secret with your own):
If you were successful using the correct credentials, running this example will return a valid access-token that you can use to make calls against the APIs you have access to.
For a more in-depth explanation of the authorization and authentication flow, consult the OAuth documentation.
To get the user info try the following curl:
A full example in Node.js can be found in our GitHub Repo
When the access token is obtained the app can access the available endpoints for this specific API.