Can't install PrimeVideo on new AppleTv 4K
I've just installed a brand new AppleTv 4K and I can't install Primevideo. For some reason AppleTV assumes that my Primevideo login is my @mac.com address, so I'm prompted to provide my password. How do I get AppleTV to request my Primevideo e-mail address sop that my password matches?
[Re-Titled by Moderator]