Cloudflare how to add domain administrator email?

Question

cloudflare

All the best
The domain is connected via cloudflare
To check the domain on a certain service, it says that a certain letter will be automatically sent to the domain name owner's email
How to add the owner's email to cloudflare?
When I added a domain not on cloudflare, but on hosting via ispmanager, a mailbox like [email protected] was automatically created for the domain
. And here I don’t even know how to do it right