I implemented a REST api in django with django-rest-framework and used oauth2 for authentication.
I tested with:
curl -X POST -d "client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET&grant_type=password&username=YOUR_USERNAME&password=YOUR_PASSWORD" http://localhost:8000/oauth2/access_token/
and
curl -H "Authorization: Bearer <your-access-token>" http://localhost:8000/api/
on localhost with successful results consistent with the documentation.
When pushing this up to an existing AWS elastic beanstalk instance, I received:
{ "detail" : "Authentication credentials were not provided." }