Extra work needed without https://github.com/tomchristie/django-rest-framework/pull/566

views.py

# Extra imports
from rest_framework.authtoken.models import Token
from rest_framework.response import Response
from rest_framework import status

class Login(ObtainAuthToken):
    serializer_class = MyAuthTokenSerializerWithExtraChecks

    def post(self, request):
        """Override the post method to use custom serializer class."""
        serializer = self.serializer_class(data=request.DATA)
        if serializer.is_valid():
            token, created = Token.objects.get_or_create(user=serializer.object['user'])
            return Response({'token': token.key})
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)