Content Locker

I have the Pro version and I’m using content locker.

There’s a problem I noticed. When content is locked and user enters email to subscribe, if the user hasn’t subscribe before, it works just fine. But if the user is already subscribed, there is no way to bypass the lock. The user is forced to subscribe with a different email or using a fake email.

How can this problem be resolved so that if the user already exist, the user is notified that they are already subscribed and the content is unlocked?

Many thanks.