How to delete the authorisation linked to an old Adobe Account?

How do I delete the Adobe Editions authorisation linked to an old Adobe Account with an email that doesn't exist anymore and which I can't remember the password?

I have tons of books in a recent account I want to read in an another MacBook Pro running MacOS Catalina but Digital Editions in this MacBook Pro is locked to this old Adobe Account with the email that doesn't exist anymore and which password I can't remember.