I think I found it.
Using groupsubscriptions, enter new, use the userID and enter the GroupID (user / committee).
So I was confusing userID and UserGroupID.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.