Is there any documentation on how I can integrate OAuth2 (Client Credentials Flow) into the authentication feature of my API? [closed]

I am building an internal REST API in Python and I could not find any comprehensive documentation on OAuth2 integration (with sample source code) for Client Credentials Flow. I am currently facing issues when implementing Basic Authentication for client application authentication. Would appreciate a lot if anyone who have built a REST API using similar framework in the past can help me out!

I am trying to implement Access Tokens as JWT tokens using RSA public-key/private-key signing. I am also facing issues with implementing Basic Authentication for client application authentication.