How to find Discord by Email.

I'm trying to find a guy on discord as I set my recovery email on an old Gmail account to his email instead of my email by accident (typo), The fact is I've tried emailing him, no response... I know he's on discord because if you try to signup on discord with an email that's taken, it show's that it's taken... So I know he is on discord. Is there any way to get his Discord so I can contact him? Thanks.