SQLite3 добавляется id,username и т.д. пользователя Telegram(aiogram).Как сделать так чтобы данные добавлялись не со сообщения,а с участников группы?

Question

[Garikoid]

def post_sql_query(sql_query):
    with sqlite3.connect('WrnDtb.db') as connection:
        cursor = connection.cursor()
        try:
            cursor.execute(sql_query)
        except Error:
            pass
        result = cursor.fetchall()
        return result

def create_tables():
    users_query = '''CREATE TABLE IF NOT EXISTS USERS 
                        (user_id INTEGER PRIMARY KEY NOT NULL,
                        username TEXT,
                        first_name TEXT,
                        last_name TEXT,
                        reg_date TEXT);'''
    post_sql_query(users_query)        

def register_user(user, username, first_name, last_name):
    user_check_query = f'SELECT * FROM USERS WHERE user_id = {user};'
    user_check_data = post_sql_query(user_check_query)
    if not user_check_data:
        insert_to_db_query = f'INSERT INTO USERS (user_id, username, first_name,  last_name, reg_date) VALUES ({user}, "{username}", "{first_name}", "{last_name}", "{ctime()}");'
        post_sql_query(insert_to_db_query )

create_tables()
@dp.message_handler(commands=['start'])
async def process_start_command(message: types.Message):
	await bot.send_message(message.from_user.id, f'Welcome  {message.from_user.first_name}' )