How to register Api telegram for Instagram?

Question

API

in order to redirect insta from the profile to a dialogue in whatsapp, it is written ( api.whatsapp.com/send?phone=79123456789)
and what exactly needs to be written in order to send it to the cart?
Or just a bot?
If through a bot, then the question is the same, what exactly should I write in the command?
The task is for the user, after clicking on the link / button, to switch the phone to a chat with a specific user / cart bot.
Thank you.

Answer 1

http://t.me/botfatherortg://resolve?domain=botfather/