title: Missing value auth-url required for auth plugin password
body: <p>I am trying to install openstack using devstack on ubuntu 16.04.
  I followed the following link.</p>
  
  <blockquote>
    <p><a href="https://docs.openstack.org/developer/devstack/guides/single-machine.html" rel="noreferrer">https://docs.openstack.org/developer/devstack/guides/single-machine.html</a></p>
  </blockquote>
  
  <p>When I run  </p>
  
  <blockquote>
    <p>sudo openstack service list</p>
  </blockquote>
  
  <p>, it prompt the following error.</p>
  
  <blockquote>
    <p>Missing value auth-url required for auth plugin password</p>
  </blockquote>