Override specific field __get__ on model instance in Django

Question

I'm trying to temporarily monkey-patch the request.user to change its behavior (in my case, I need to warn developers that the field is deprecated or raise an exception)

I have a middleware like this:

def middleware(request: HttpRequest) -> HttpResponse:
    if request.user.is_authenticated and request.user.patient is not None:
        def _get_patient():
            raise SomeAPIError()  # or return value with warning
        request.user.patient = _get_patient

    response = get_response(request)

    return response

return middleware

The problem is that, of course, Django doesn't let me to do this so straightforward. I understand that patient property here is a descriptor, and I want to override its __get__ method, but I don't know how.

I also can't just rename the field in Model and create a property in place of old field, because I still need this field in many places, I just want to make it inaccessible via request.user.patient