This is part two on how to write an OAuth client and server. If you have not read Part One yet, you should take a look at it.

This post covers a lesser-known part of OAuth, which is console-based app authentication. You’ve probably seen it in action with the gcloud and heroku apps. Console-based app OAuth generally follows the same flow as that of a web app (auth code flow) with a few changes thrown in. I will explain how it works along with code examples. The code is written in Python and was tested on the 3.10 version. You can find it here.