Code review comment for lp://staging/~vila/ubuntu-ci-services-itself/secgroups

This is a reasonable addition to me to quickly clean things up when I know what I'm doing, but I'm hitting an authorization issue:

Traceback (most recent call last):
  File "./leon.py", line 92, in <module>
    leon.clean_spurious_security_groups()
  File "./leon.py", line 73, in clean_spurious_security_groups
    groups = self.nova.security_groups.list()
  File "/tmp/venv/local/lib/python2.7/site-packages/python_novaclient-2.15.0-py2.7.egg/novaclient/v1_1/security_groups.py", line 96, in list
    'security_groups')
--snip a bunch of novaclient code--
  File "/tmp/venv/local/lib/python2.7/site-packages/python_novaclient-2.15.0-py2.7.egg/novaclient/client.py", line 189, in request
    raise exceptions.from_response(resp, body, url, method)
novaclient.exceptions.Unauthorized: The request you have made requires authentication. (HTTP 401)

I have a unit_config file with the auth* and juju_env parameters defined. I can also manually run "nova secgroup-list" and view my security groups. Do I need to have some authorization enabled on my account?