[Python] I don't know how to get_chat_members_count with aiogram

I am writing a bot and I can't find a clear answer to how to get number of members in the group and when a user writes /count in the bot, he would get the number of participants in the group.

tell me pls what's wrong. Here is the code I made:

from aiogram import Bot
from aiogram import types
from aiogram.dispatcher import Dispatcher
from aiogram.utils import executor

from config import token

bot = Bot(token=token)
dp = Dispatcher(bot)

@dp.message_handler(commands=['count'])
async def getCountMembers(message: types.Message):
await bot.get_chat_members_count(-1001519650013)


executor.start_polling(dp, skip_updates=True)

Continue reading...