I am trying to build a telegram bot. In that I need to know if anyone is registered with a email address. I checked the documentation but didn't found any answer. If it is possible with telegram core api please feel free to answer.
There is no possibility to register in Telegram using anything else except phone number.
You can NOT use email, social auth or any other kind of tokens.
Only phone number.
How to programmatically check if a email is registered in the Telegram?