Looking for up to date "secure invites" type plugin

I’ve been looking for a plugin for a private website that only allows registration for people invited by current registered users and I found one called Secure Invites The only problem is this plugin is no longer updated, does anyone know a plugin that does exactly what this one does that is up to date and still being updated. I have no problem paying for a plugin so if it is a paid plugin no probs.

Can anyone make a recommendation? I am having a hella bad time finding one.