Aldian Fazrihady
I implemented some API backends to be used by the Unity frontend.
It was developed using Django REST Framework.
The details can be read on my blog:
https://www.aldianfazrihady.com/en-us/blog/1a2adcb7-8fb8-4a52-a16c-201aabba0948/accessing-multiple-resource-servers-with-oauth-2/
https://www.aldianfazrihady.com/en-us/blog/ea4032e2-7e3e-418e-b7ca-6e331debaf76/implementing-oauth2-auth-server/