If you subscribed via iTunes and did not complete your account with an email address and password, you can use the "Restore Purchase to Sign In" feature (on the app's home screen) to log in on Apple TV and iPhone/iPad.
If you subscribed via iTunes and did not complete your account with an email address and password, you can use the "Restore Purchase to Sign In" feature (on the app's home screen) to log in on Apple TV and iPhone/iPad.