def __init__(self, session, url):
self.session = session<EOL>self.url = ensure_trailing_slash(url)<EOL>self.root_url = get_root_url(url, warn=False)<EOL>
Create a LuminosoClient given an existing Session object that has a
_TokenAuth object as its .auth attribute.

It is probably easier to call LuminosoClient.connect() to handle
the authentication for you.