@bot.message_handler(commands=['start'])
def welc(message):
idUser = message.from_user.id
userName = message.from_user.first_name
bot.send_message(message.chat.id, "Что хотите узнать?")
cur.execute("INSERT INTO users(username, id_tele) VALUES(?, ?)", (userName, idUser))
cur.close()
conn.commit()