Ability to pass kwargs in perform_create in CreateModelMixin.

[yogeshmanghnani]

I was thinking of adding the ability to pass kwargs to serializer.save() through the CreateModelMixin,

I have put down a demonstration of what can be done.
With this we will be able to pass kwargs to serializers in any View using CreateModelMixin

class CreateModelMixin:
    """
    Create a model instance.
    """
    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer, **kwargs)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)

    def perform_create(self, serializer, **kwargs):
        serializer.save(**kwargs)

    def get_success_headers(self, data):
        try:
            return {'Location': str(data[api_settings.URL_FIELD_NAME])}
        except (TypeError, KeyError):
            return {}

We can use it like this than

class CreateProductView(generics.CreateAPIView):
    def create(self, request, *args, **kwargs):
        return super.create(request, *args, created_by=request.user, **kwargs)

What do you guys think? Am I thinking in the correct direction or am I completely wrong?