Class FileRequest depends on _request_params property.
This property is using self parameters which are set in the send method.
There is also problem with the auth property which is now set as self.request.auth = self.auth so if you set this property for the endpoint which requires authentication it is then set for every other endpoint even though it doesn't require authentication. We can't set the auth in BaseProxy for every subclass because it might need gssapi authentication unnecessarily.

We need to reimplement this behaviour so we can set the auth property somehow intelligently and we don't need to set self parameters in the send method.