Telegram bot. How to get all users who at least once wrote / start?

Question

API

Tell me how to get all the users who at least once wrote the command to the bot: / start ch-s API (ie subscribers)? in Google I find information only about how to get users in a conversation. If possible, Curl or an example of the route where to send the request

Answer 1

A request to Telegram will not work. It is necessary to save all users in the database.

Answer 2

Request a history for each and see if they sent /start