title: arcanist install-certificate fails
body: <p>I set up my own hosted phabricator, everything is working fine (Diffusion repo etc)</p>
  
  <p>I ran into problem after I installed arcanist on my dev box and run 'arc install-certificate', got exception as following: </p>
  
  <p>rying to connect to server...
  LOGIN TO PHABRICATOR
  Open this page in your browser and login to Phabricator if necessary:</p>
  
  <p>http:///conduit/login/</p>
  
  <p>Then paste the API Token on that page below.</p>
  
  <pre><code>Paste API Token from that page: cli-e644viducdcccrge4i7zo5nfa66d
  </code></pre>
  
  <p>Usage Exception: The token "cli-e644viducdcccrge4i7zo5nfa66d" is not a valid API Token. The server returned this response when trying to use it as a token: ERR-CONDUIT-CORE: Attempting to access attached data on PhabricatorUser (via getAwayUntil()), but the data is not actually attached. Before accessing attachable data on an object, you must load and attach it.</p>
  
  <p>I am wondering what's might go wrong? Thank you very much for your insights!</p>