Ok, it's same process that I used for Ezviz skill enablement in my Amazon account.I just logged into my Amazon account and searched for LaView One skill.
From there it enabled it and took me to the link I posted to authorize my LaView Account.
I'm not sure if LaView will let us register non-HALO units if they happen to cross reference S/N so haven't tried removing from Ezviz and trying to register with my empty LaView account even though it has identical logon credentials as the Ezviz/RCA/LTS/Clare/etc. CES articles on Ezviz claims Alexa and Google Assistant support for Ezviz DB1 but so far haven't been able to discover it via Alexa or Google home. Let us know once you get FW from LaView in Q2 that enables ONVIF.