title: Azure Web App written in Node.JS with AD security, who is the user accessing this page?
body: <p>Azure Web App written in Node.JS with AD security, is there a environment variable that can tell me who is accessing this page?</p>
  
  <p>Created Azure Web App.  This works well.  Enabled Azure AD security.  When I access this page it takes me to the Azure sign-in page and then goes to my page.  Is there a environment variable that can tell me who is accessing this page -- i.e., person who just signed in.</p>