title: Django restful API - get user id with token
body: <p>How to obtain User ID from Django API having authentication token?
  Basically, I want to send authentication token and get back User id.
  I have tried this solution: <a href="https://stackoverflow.com/questions/44448878/how-can-i-return-user-id-with-token-in-django">How can I return user ID with token in Django?</a>
  but it is returning token with provided username and password, which is not what I want.</p>