I'm checking the number. How to fix something like this?

Question

Python

I'm checking the number. At startup, there is a confirmation button that, when pressed, sends the user's contact. But this can be bypassed simply by sending any contact from the telegram. How can this be fixed?

Answer 1

The Contact object has a field user_id. Accordingly, check that user_idfrom the contact is equal user_idto the user who sent you the message.