"I Don't recognize the private relay address in my account"
"I saw a relay account, I have no idea what that is"
When you create an account with an app or website using Sign in with Apple, if you choose to hide your email, a unique, random email address is created so your personal email can stay private.
The app/website, like Cyrus in this case, receives only this private relay account, and not your actual email address. Apple forwards emails received to this account to your apple ID account.
To fully enjoy the services Cyrus provides, we will need to know your actual email address.
More about Apple's "Hide my email" service at - https://support.apple.com/en-us/HT210425
If you want to change this setting or Remove Apple Private Relay in your Apple Account, Click Here to learn how