fenris@macbuntu:~$ juju run --unit openstack-dashboard/0 "keystone user-list"
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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
b3:4e:ed:f9:d6:11:77:0b:e7:01:0f:ce:c2:1f:8d:4a.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:1
  remove with: ssh-keygen -f "/root/.ssh/known_hosts" -R 10.0.0.52
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
Expecting an auth URL via either --os-auth-url or env[OS_AUTH_URL]
ERROR subprocess encountered error code 1