title: Unique invite link to telegram channel using telethon
body: <p>I want to create an invite system to a telegram channel (public but also later private).</p>
  <p>I saw that a telethon bot can create his own invite link. So is it possible to get an invite link from a member of the group that is not the bot itself?</p>
  <p>Or maybe anyone has another idea? Want that member can earn points by inviting others... so far I do that by a bot who asks &quot;who invites you&quot; and add the user to the channel but there is some trouble by writing usernames wrong etc...</p>