title: keep track of active users - Angular
body: <p>I have a web page with angular and I need to know the number of active users, it is useless to do it based on the users who have logged in, because perhaps they logged in once and have not entered again, I was thinking that I could track the user click on the modules that I have.</p>
  <p>Has anyone had this problem?</p>
  <p>any other better idea?</p>