ATV4 requiring 2FA to sign in to MGM+ app

Here's an update. A couple of weeks ago, I emailed MGM again, and they said it was Apple that was making them require 2FA to sign in to the new ATV app, and I should contact them, so I did. I called Apple Support, and the really-helpful rep not only did research, but contacted several other reps to ask what they new, including someone from the Media dept, where a 2FA requirement would be established. All of them said that it is NOT Apple. They do not require apps to enforce 2FA to log into the app. And if they did, it would be ALL apps on ALL devices, and not just this one app on the ATV. In fact, once you are logged into your ATV, no app should actually pay attention to that at all. They should only care about their own log in/activation. It's none of their business whether 2FA is used or not. SO, this is all MGM's doing.

So then I called MGM this time, and the rep kept saying it WAS Apple, and I kept telling her she was wrong, explaining everything I was told, and to pass the message to their developers so they can fix it and make it work like the EPIX app. Of course the rep probably didn't do anything. It's ridiculous that they are holding the use of my paid app hostage because I don't want to use 2FA (and don't even need to, according to Apple). At least I can use it on my Roku when I need to (or airplay).