Authorization Code Grant for Oauth

I am currently trying to integrate Oauth into my app and I am following this blog post I can see there is provision for Authorization Code Grant as a server to server security mechanism, which will be best suited for my purposes, but I can’t seem to find any reference on how to use it. I have googled, checked the docs and tried several other things (try and error), but I can’t seem to find any information on how to use this. I’d like a link to a documentation or any reference at all that can point me in the right direction. Thanks

Can you give this documentation and go and see if that helps.