old_contents: from rest_framework import parsers, renderers
  from rest_framework.authtoken.models import Token
  from rest_framework.authtoken.serializers import AuthTokenSerializer
  from rest_framework.response import Response
  from rest_framework.views import APIView
  
  
  class ObtainAuthToken(APIView):
      throttle_classes = ()
      permission_classes = ()
      parser_classes = (parsers.FormParser, parsers.MultiPartParser, parsers.JSONParser,)
      renderer_classes = (renderers.JSONRenderer,)
      serializer_class = AuthTokenSerializer
  
      def post(self, request):
          serializer = self.serializer_class(data=request.data)
          serializer.is_valid(raise_exception=True)
          user = serializer.validated_data['user']
          token, created = Token.objects.get_or_create(user=user)
          return Response({'token': token.key})
  
  
  obtain_auth_token = ObtainAuthToken.as_view()
  
new_contents: from rest_framework import parsers, renderers
  from rest_framework.authtoken.models import Token
  from rest_framework.authtoken.serializers import AuthTokenSerializer
  from rest_framework.response import Response
  from rest_framework.views import APIView
  
  
  class ObtainAuthToken(APIView):
      throttle_classes = ()
      permission_classes = ()
      parser_classes = (parsers.FormParser, parsers.MultiPartParser, parsers.JSONParser,)
      renderer_classes = (renderers.JSONRenderer,)
      serializer_class = AuthTokenSerializer
  
      def post(self, request, *args, **kwargs):
          serializer = self.serializer_class(data=request.data)
          serializer.is_valid(raise_exception=True)
          user = serializer.validated_data['user']
          token, created = Token.objects.get_or_create(user=user)
          return Response({'token': token.key})
  
  
  obtain_auth_token = ObtainAuthToken.as_view()
  
subject: Add extra args/kwargs to authtoken's views (#3718)