Would you like to write a test for this? It would involve making an instance with a value, and then asserting that the GUI's filesystem instance attribute has the right option set. A good candidate would be '{"auto_mkdir": True}' with the "file" protocol, which sets the auto_mkdir attribute on the instance (and is False by default).

ah didn't think of using a non authentication related kwarg.. test added.

(please runt he precommit hooks for linting - you are getting a little formatting edits and trailing whitespace)