How to make a Telegram bot user registration in Python via SQLite3?

Question

Bots

I write a bot in Python in Telegram
I use telebot
How to make it so that when the / start command is pressed, there is a check if the user is in the database or not.
Regarding the database - the name of the user table in it is telegram_id ; username ; status
If there is no user, writes his telegram_id ; username ; status(always 1)
If there is also its status = 1, then write to it - Hello!
Preferably with an example, thanks in advance!

Answer 1

He himself described step by step how to do it, now it remains to go and study SQL so that you no longer come here with such elementary questions.