How to alow users to use the same email address on different accounts?

I’m working on a mastodon instance over a tor hidden service. I’m using version 2.0.0 of mastodon because it supports “local_https=false”. I’ve been working on removing the email requirement and replacing it with a type “tor” or “what is 1+1” or something but i can’t figure out how to allow users to use the same email address.

Also well I’m here what is the latest version that supports “local_https=false”?

Please help i have no idea what I’m doing.