I tried on my VTO2111. I typed 888888 for the Domain accounts and yes I got a QR code that contains the url
https://svsh.dahuatech.com/svsh.html?v=2&u=888888&t=xxxxxxxxxxxxxxxxxx
where xxxxxx is a string of 64 characters.
The web page says
Agent 888888.
To get a Authent code, You must verify...