how can I obtain connected user list froma webservice

[mat]

Hello,

I try to list all connected users on an OM instance, the same as on the 
Webdashboard in admin/connections, but I'd like to obtain it via a 
webservice.

I didn't find the entry point in UserWebService, nor in RoomWebService, 
nor in GroupWebService.

Can you point me in the right direction?

Thanks in advance,

FHelmer