This section is not a step by step guide on how to create an OAuth 2.0 provider in Flask. Instead, we will learn how the Flask implementation works, and some technical details in an OAuth 2.0 provider.
If you need a quick example, here are the official tutorial guide and examples on GitHub:
At the very beginning, we need to have some basic understanding of the OAuth 2.0.
If you are developing on your localhost, remember to set the environment variable:
Looking for Flask OAuth 2.0 client? Check out Flask OAuth Client.