Currently webflow account holders with user groups enabled can filter their user accounts list via "access groups" and "status". Those of us who manually invite members have no way of filtering new members who sign up but have yet to be put in an access group.
Setting up a webhook on new member sign up to make an email notification is the only way I can think of to determine which users are yet to be added to a group.
I think that being able to filter users who are yet to have a group assigned would eliminate inbox drama and tracking this info when other steps have to be taken between setting up an account and adding a user to a group that can't be automated (beacuase they require a hands on approach for whatever reason). Cheers :)