Once the Qml module namespace has been renamed to SSO.OnlineAccounts provide compat layer for Ubuntu.OnlineAccounts
With the Ubuntu.OnlineAccounts namespace we have to watch out, because there is a similar project to this in Ubuntu Touch [1].
The QML namespace in the online-accounts-api project will be renamed to Lomiri.OnlineAccounts soon, but it will also receive a compat layer for the previous namespace, and that is also Ubuntu.OnlineAccounts (but with a different version).
[1] https://gitlab.com/ubports/development/core/online-accounts-api/