Alrighty!
In case anyone somehow ends up (1) with OpenNebula, and (2) using the xmlrpc API rather than CLI…
- Used https://www.powershellgallery.com/packages/XmlRpc
- Used -Debug output to see the methodCall it was creating
- Used the screenshots from this, to figure out the correct schema for the methodCall (i.e. the first parameter (“username:password”) should simple be enclosed in
<value>username:password</value>, not wrapped in a type - Constructed the methodCall manually (todo: create function), everything worked!