Is it possible to send a person from the site to a closed telegram channel?

Question

API

Hello. There is a site on php, let's say the simplest page. It needs to make a login input field and a button, where the login field is the visitor's login in telegram.
Question: Is it possible in this way to add a person after the send form - to a closed telegram channel? If so, in which direction to dig?

Answer 1

In the telegram client protocol, or give him an invite link.