title: Set someone else as cluster admin via kql syntax
body: <p>I created a kusto cluster and database as one of my accounts on one Azure subscription, but now I want to grant cluster admin permissions to one of my other accounts that is not part of this subscription.</p>
  <p>I have to do this via a kql command, or some other way I can manually pass in which users are becoming admins.</p>
  <ol>
  <li><p>Is there such a thing as Cluster Admin permissions?</p>
  </li>
  <li><p>I added my other account as an admin to one of the databases in my cluster using</p>
  <p>.add database DatabaseName admins ('aaduser=username@email.com')</p>
  </li>
  </ol>
  <p>but I cannot seem to do the same on a cluster level. How can I do this?</p>