Using Apple TV on new LG OLED TV
I recently bought an iPhone 12 Pro which has a promotion giving me a year of free Apple TV+.
I also just bought an LG OLED UHD TV which has the Apple TV app already on it.
When I bring up the app on the TV and select a show to watch, it asks me to click on "start free trial", and indicates I'll get 7 days free after which I'll be charged $4.99/month.
How do I get the app on my LG TV to recognize that I have a paid 1 year subscription to Apple TV?