title: DRUPAL - How can I add user ID (UID) to the activation email oder user page?
body: <p>How can I add the value user id (uid) from user db in to the activation email?</p>
  
  <p>like : "hi XY your ID is :1234"</p>
  
  <p>and I would like to print out the id on the user page.</p>
  
  <p>thx</p>