After signing up for Apple TV, you should receive an email containing instructions to create a username and password which will allow your Hallmark Movies Now account to be used on other devices.
It is important that you use the same email address and password that was used to sign up on Apple TV. Any changes may prevent your Hallmark Movies Now account from syncing to your Apple TV.
If you've signed up for Hallmark Movies Now through Apple TV, you must manage your subscription through iTunes as you would for any other channel on Apple TV.
If you have any problems, please visit http://www.apple.com/support/appletv/contact/ for further information.