title: Multiple initial admin or initial admin group
body: <p>I have few question on Apache NiFi</p>
  
  <ol>
  <li><p>In NiFi, Can i set more than one user for <code>Initial Admin Identity</code>?</p></li>
  <li><p>Also, i want to set a group with admin privileges. Can i add groups in <code>Initial Admin Identity</code> property</p></li>
  </ol>
  
  <p>I have asked to reload authorizers.xml file at runtime
  <a href="https://stackoverflow.com/questions/45325413/reload-authorizers-xml-file-at-runtime">Reload authorizers.xml file at runtime</a></p>
  
  <p>But it is only startup configuration and cannot be done after started NiFi. </p>
  
  <ol start="3">
  <li>Is there any single REST API to add admin privilege for a user instead of calling multiple APIs for individual policies. </li>
  </ol>