testnet server not working

[StojanovicVladimir]

hi, i have issue connecting to testnet server.
here is my code
from btcpay import BTCPayClient

client = BTCPayClient.create_client(host='https://testnet.demo.btcpayserver.org', code="sDRbK7H")

invoice_list = client.get_invoices(status='confirmed')
print(invoice_list)
Do i need to have my own server to test it or it works on testnet?. Thanks

[Snickleblor]

what is the issue?