[Feature] Login through Telegram

[bigfoot90]

I have created a web site for my Bot, and want to permit users to login using their Telegram account.
I've created a custom Authenticator following the instructions on this page.

But would be awesome is this bundle could provide a solution out of the box.

Edit: Created a gist with my current TelegramAuthenticator implementation
Tested on Symfony 5.0
and shoud work on 4.4 also, but I can't test it now.