vk_api BOT with MongoDB | nobody

import vk_api
from vk_api.longpoll import VkLongPoll, VkEventType
from vk_api.keyboard import VkKeyboard, VkKeyboardColor
from pymongo import MongoClient
from random import randint, choice

session = vk_api.VkApi(token="token")
cluster = MongoClient("link on connect")
collection = cluster.testdb.testcoll


def send_message(user_id, message, keyboard=None):
    post = {
        "user_id": user_id,
        "message": message,
        "random_id": 0
    }

    if keyboard != None:
        post["keyboard"] = keyboard.get_keyboard()
    else:
        post = post

    session.method("messages.send", post)


def menu(user_id):
    keyboard = VkKeyboard(one_time=True)
    buttons = ["🥑 account", "🏪 shop", "🍩 work"]
    buttons_color = [VkKeyboardColor.POSITIVE, VkKeyboardColor.DEFAULT, VkKeyboardColor.PRIMARY]

    if collection.count_documents({"_id": user_id}) != 0:
        buttons = buttons
        buttons_color = buttons_color

    for button, button_color in zip(buttons, buttons_color):
        keyboard.add_button(button.title(), color=button_color)

    if collection.count_documents({"_id": user_id}) == 0:
        keyboard.add_line()
        keyboard.add_button("Registration", color=VkKeyboardColor.NEGATIVE)

    return keyboard


for event in VkLongPoll(session).listen():
    if event.type == VkEventType.MESSAGE_NEW and event.to_me:
        user_id = event.user_id
        text = event.text.lower()

        if text == "menu":
            send_message(user_id, "Hello, unknown user, choice an action", menu(user_id))
        elif text == "🥑 account":
            if collection.count_documents({"_id": user_id}) == 0:
                send_message(user_id, "You are not registered in the system...", menu(user_id))
            else:
                keyboard = VkKeyboard()
                keyboard.add_button("Back", color=VkKeyboardColor.NEGATIVE)

                account = collection.find_one({"_id": user_id})
                hearts = "❤️ 🧡 💛 💚 💙 💜 🖤 🤍".split(" ")
                conclusion = f"""
                {choice(hearts)} ID: {account["_id"]}
                💰 Balance: {account["balance"]}
                ⚰️ Wood: {account["items"]["wood"]}
                🧱 Stone: {account["items"]["stone"]}
                """

                send_message(user_id, conclusion, menu(user_id)) # Here the problems...
        elif text == "registration":
            if collection.count_documents({"_id": user_id}) == 0:
                post = {
                    "_id": user_id,
                    "balance": 1000,
                    "xp": 0,
                    "items": {
                        "wood": 0,
                        "stone": 0
                    }
                }
                collection.insert_one(post)

                send_message(user_id, "You were successfully added to the system", menu(user_id))
            else:
                send_message(user_id, "You already registered in the system!", menu(user_id))
        elif text == "🍩 work":
            if collection.count_documents({"_id": user_id}) == 0:
                send_message(user_id, "You are not registered in the system...", menu(user_id))
            else:
                keyboard = VkKeyboard()
                buttons = ["earn", "back"]
                buttons_color = [VkKeyboardColor.PRIMARY, VkKeyboardColor.NEGATIVE]

                for button, button_color in zip(buttons, buttons_color):
                    keyboard.add_button(button.title(), color=button_color)

                send_message(user_id, "Choice an action", keyboard)
        elif text == "earn":
            if collection.count_documents({"_id": user_id}) == 0:
                send_message(user_id, "You are not registered in the system...", menu(user_id))
            else:
                income = randint(100, 1000)
                collection.update_one({"_id": user_id}, {"$inc": {"balance": income}})

            send_message(user_id, f"You are successfully earned {income}")
        elif text == "back":
            send_message(user_id, "Choice an action", menu(user_id))
        elif text == "🏪 shop":
            if collection.count_documents({"_id": user_id}) == 0:
                send_message(user_id, "You are not registered in the system...", menu(user_id))
            else:
                keyboard = VkKeyboard()
                buttons = ["wood", "stone"]

                for button in buttons:
                    keyboard.add_button(button.title())
                keyboard.add_line()
                keyboard.add_button("Back", color=VkKeyboardColor.NEGATIVE)

                send_message(user_id, "Wood - 100 💵\nStone - 100 💵", keyboard)
        elif text == "wood":
            if collection.count_documents({"_id": user_id}) == 0:
                send_message(user_id, "You are not registered in the system...", menu(user_id))
            else:
                balance = collection.find_one({"_id": user_id})["balance"]
                if balance <= 0:
                    send_message(user_id, "Insufficient funds", menu(user_id))
                elif balance < 100:
                    send_message(user_id, "Insufficient funds", menu(user_id))
                else:
                    collection.update_one({"_id": user_id}, {"$inc": {"items.wood": 1, "balance": -100}})
                    send_message(user_id, "You are successfully bought product")
        elif text == "stone":
            if collection.count_documents({"_id": user_id}) == 0:
                send_message(user_id, "You are not registered in the system...", menu(user_id))
            else:
                balance = collection.find_one({"_id": user_id})["balance"]
                if balance <= 0:
                    send_message(user_id, "Insufficient funds", menu(user_id))
                elif balance < 100:
                    send_message(user_id, "Insufficient funds", menu(user_id))
                else:
                    collection.update_one({"_id": user_id}, {"$inc": {"items.stone": 1, "balance": -100}})
                    send_message(user_id, "You are successfully bought product")