title: How save the number of logins to the application ?(nodejs,JS,mongodb)
body: <p>I use in my project mongodb database with nodejs and javascript.
  I wonder how can I save number of logins to my application to e.g database table.
  (After successful login to application, by insert an email and password).
  I use (passport authentication with nodejs).</p>
  
  <p>Can you lead me somehow ?</p>
  
  <p>Best regards</p>