Apple has officially launched its new
Single sign-on feature for iOS and tvOS with the release of iOS 10.2 and tvOS 10 which now appears to be live and
available to the public adding some more video providers like CenturyLink Prism,
Hawaiian Telecom, MetroCast, GTA (available in Guam).
apple-launches-single-sign-on-for-ios-10.2-and-tvos-10
Single sign-on lets you sign in to your
cable or satellite-TV provider on your iPhone, iPad, iPod touch, or Apple TV without
needing to sign in again.

Since Single sign-on is only available in the United States and is currently
supports TV providers as below;

● CenturyLink Prism
● DirecTV
● Dish
● GVTC
● GTA
● Hawaiian Telcom
● Hotwire
● MetroCast
● Sling

Not all apps have been updated to work
with Single Sign-On yet, but you can find them from the AppStore.
Here are the apps supported with Single
Sign-On listed by Apple:
  • A&E (iOS only)
  • Bravo Now (tvOS only)
  • E! Now (tvOS only)
  • Hallmark Channel Everywhere (iOS and
    tvOS)
  • History (iOS only)
  • Lifetime (iOS only)
  • NBC (tvOS only)
  • Syfy Now (tvOS only)
  • Telemundo Now (tvOS only)
  • USA NOW (tvOS only)
  • Watch HGTV (iOS and tvOS)
  • Watch Food Network (iOS and tvOS)
  • Watch Cooking Channel (iOS and tvOS)
  • Watch DIY (iOS and tvOS)
  • Watch Travel Channel (iOS and tvOS)