I would make sure you have the correct email on Adobe.com first. You can change it using the process here if needed: Adobe ID, sign in, and account help
You could also create a new Adobe ID with the correct email address if needed. Once you have the correct email set on Adobe.com you should be able to complete the verification process.
You can sign out of the currently used email address in the Creative Cloud app from its preferences Gear icon in the top right > Preferences > Account section
Solution 5 (with the app closed will also reset it) App doesn't open | Progress wheel spins continually
and on relaunch you should be prompted to re-enter it
Hope that helps,