What, specifically, are you trying to accomplish?
how is the group configured? how is the access rule configured?
I think I've figured this out.
I wanted to create a "super admin" using "email addresses" but I've found that this is not possible.
It is possible however using the user ID (SecurityAssist_ID) when logging in.
For some reason SecurityAssist -Access Group Manager - only accepts integers as 'Group Members' and not 'text fields' for 'email addresses'
I've entered a group field as an integer and it works perfectly