Heads up if using PayPal for purchases

Remember that you can only authenticate PayPal as a purchase option for iTunes, App Store, etc. On a computer!

Unfortunately there is nothing on iOS that will tell you that, and after updating to iOS 11 and trying to purchase something on my Apple TV I went into this loop that wouldn’t let me go to PayPal to authenticate in the iOS iTunes store.

Gotta do it on the computer. I hope this save somebody else a lot of grief and aggravation.