Embedding Key In Email

Issue Summary

This module really meets a major need I had, but I do have one basic question: When a group is assigned a key, I cannot seem to be able to create an invite email at all, let alone with the key embedded in it. I've tried this using both the group's Add Member's tab (the form only allows user names, not email addresses), as well as the New Invitation tab provided by the Invite module (which also only allows user names, not email addresses). Any guidance on how I can enter email addresses, and how the key will be embedded in the invitational email, will be greatly appreciated.