# ./bin/swift-account-stats -r http://127.0.0.1:8080/v2.0/ admin:admin admin
Traceback (most recent call last):
  File "./bin/swift-account-stats", line 150, in <module>
    main()
  File "./bin/swift-account-stats", line 92, in main
    tenant_name=admin_tenant)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/v2_0/client.py", line 144, in __init__
    self.authenticate()
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/utils.py", line 318, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/httpclient.py", line 392, in authenticate
    resp = self.get_raw_token_from_identity_service(**kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/v2_0/client.py", line 170, in get_raw_token_from_identity_service
    return a.get_auth_ref(self.session)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/auth/identity/v2.py", line 86, in get_auth_ref
    authenticated=False)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/session.py", line 325, in post
    return self.request(url, 'POST', **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/utils.py", line 318, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystoneclient/session.py", line 266, in request
    raise exceptions.from_response(resp, method, url)
keystoneclient.openstack.common.apiclient.exceptions.Unauthorized: Unauthorized (HTTP 401)