Checklist

• I have verified that that issue exists against the master branch of Django REST framework.
• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• This is not a usage question. (Those should be directed to the discussion group instead.)
• This cannot be dealt with as a third party library. (We prefer new functionality to be in the form of third party libraries where possible.)
• [] I have reduced the issue to the simplest possible case.
• [] I have included a failing test as a pull request. (If you are unable to do so we can still accept the issue.)

Steps to reproduce

1. create api viewset and try to access self.request.
2. integrate docs endpoint as described in docs
3. hit the docs endpoint in browser

Expected behavior

API docs page should render

Actual behavior

Error 'NoneType' object has no attribute 'user'
traceback
self.request is None