"name 'IntegrityError' is not defined"

[sarwarmdgolam]

Describe the bug
Exception type 'IntegrityError' is not found

To Reproduce
Steps to reproduce the behavior:

1. POST http://localhost:8022/auth/convert-token
2. Response shows 500Errors
   {
   "detail": [
   "name 'IntegrityError' is not defined"
   ]
   }

Expected behavior
'IntegrityError' list need to import properly.

[bojanKuzma]

I made a PR for this error, it's because some imports of exceptions are missing and the error messages indicates that they are missing, until approval you can just import the missing constant and class with:

from django.db import IntegrityError
from rest_framework.status import HTTP_500_INTERNAL_SERVER_ERROR