Adding an inline keyboard to another user?

Question

Bots

It is necessary that the user writes the /start command to the BOT and the other user receives the message "ID: 123456789" and an inline keyboard with the HELLO button is added and when HELLO is pressed, the user with the ID that is written above sends hello!

Answer 1

The bot can only interact with users it has already interacted with. In the event that both of these users have already once written / start to him, then you can do this.