Problem with Streaming API

[gio961gio]

Hi everyone , i have this error :
TypeError Traceback (most recent call last)
Cell In[8], line 91
87 # Disconnecting
88 ig_stream_service.disconnect()
---> 91 main()
Cell In[8], line 44, in main()
42 ig_session = ig_stream_service.create_session()
43 # Ensure configured account is selected
---> 44 accounts = ig_session[u"accounts"]
45 for account in accounts:
46 if account[u"accountId"] == config.acc_number:
TypeError: 'NoneType' object is not subscriptable

with this code:

import time
import sys
import traceback
import logging
import os

from trading_ig import IGService, IGStreamService

from trading_ig.config import config

from trading_ig.lightstreamer import Subscription

def on_prices_update(item_update):

    print(
        "{stock_name:<19}: Time {UPDATE_TIME:<8} - "
        "Bid {BID:>5} - Ask {OFFER:>5}".format(
            stock_name=item_update["name"], **item_update["values"]
        )
    )

def on_account_update(balance_update):

    print("balance: %s " % balance_update)


def main():

    logging.basicConfig(level=logging.INFO)

    ig_service = IGService(config.username, config.password, config.api_key)

    ig_stream_service = IGStreamService(ig_service)
    ig_session = ig_stream_service.create_session()
    accounts = ig_session[u"accounts"]
    for account in accounts:
        if account[u"accountId"] == config.acc_number:
            accountId = account[u"accountId"]
            break
        else:
            print("Account not found: {0}".format(config.acc_number))
            accountId = None
    ig_stream_service.connect(accountId)

    subscription_prices = Subscription(
        mode="MERGE",
        items=["L1:CS.D.GBPUSD.CFD.IP", "L1:CS.D.USDJPY.CFD.IP"],
        fields=["UPDATE_TIME", "BID", "OFFER", "CHANGE", "MARKET_STATE"],
    )

    subscription_prices.addlistener(on_prices_update)

    sub_key_prices = ig_stream_service.ls_client.subscribe(subscription_prices)

    subscription_account = Subscription(
        mode="MERGE", items=["ACCOUNT:" + accountId], fields=["AVAILABLE_CASH"],
    )

    subscription_account.addlistener(on_account_update)

    sub_key_account = ig_stream_service.ls_client.subscribe(subscription_account)

    input(
        "{0:-^80}\n".format(
            "HIT CR TO UNSUBSCRIBE AND DISCONNECT FROM LIGHTSTREAMER"
        )
    )

    ig_stream_service.disconnect()

main()

I have no problem with the Rest API and i tried and works the stream companion.