Apple TV and Amazon Prime

Received and installed a new 2022 Apple TV 4K. Amazon Prime app is included along with other streaming apps. The problem is that opening Amazon Prime on Apple TV 4K I cannot log onto MY Amazon Prime! It's seems just a generic variation of Amazon Prime. There is no deleting and reinstalling of the included Amazon Prime app that I am aware of.

So, how do I log into MY Amazon Prime account using Apple TV?