title: telegram private channel unique invite link
body: <p>i create a private channel in telegram. 
  i want to know if there is any way to create an unique invite link that i can share to people i want to join my channel. unique like single use.
  actually telegram gives you an invite link but its always the same so if i give it to a person he can give it to anyone he wants. i need a method to avoid this. i'd tried some url shortening services to hide the invite link but at the end they still show the iniztial invite link.
  any suggestion?</p>
  
  <p>i'd tried <a href="http://once.ly/index.html" rel="nofollow noreferrer">http://once.ly/index.html</a></p>