How to get the username of the user who clicked on the button?

Question

Python

Good afternoon!
I will describe briefly. I'm creating a bot and at this stage I'm trying to save and get the user's Jwt token for further work with the API. But this is not the task, the token is saved with the username of the user, but I don’t get it because I get the username of the bot and try to get a record in sqlite db using it.
How to solve it?
The code:

with sqlite3.connect(config.db_name, isolation_level=None) as conn:
                cursor = conn.cursor()
                stmt = "SELECT token FROM users WHERE username=:login"
                args = {'login': str(call.message.from_user.username)}
                cursor.execute(stmt, args)
                row = cursor.fetchone()
                token = row[0] if row is not None else ''
                print(str(call.message.from_user.username))