URLError doesnt have code attribute

[francoisgfx]

I dont believe URLError have a code attribue. HTTPError does though. HTTPError inherit from URLError. So I have doubt this case can happen here :
https://github.com/shotgunsoftware/python-api/blob/master/shotgun_api3/shotgun.py#L2668

https://docs.python.org/3/library/urllib.error.html#urllib.error.URLError