Invitation link with an expiration date

Hello!

My team and I were wondering if we can secure even more of our HB community, and we thought it would be a great idea to have invitations link that have an expiration date. For example: Create an invitation link that expires in 24 hours. We know we would need to constantly update our email invitations, but this could allow us to limit unwanted registrations. This is a solution for the limited 100 pre-approved email lists that we currently have on Heartbeat.