Apple has started rolling out the anticipated Single Sign-On feature to iOS 10.2 and tvOS 10.1 beta users. Available for iPhone, iPad, and Apple TV, Single Sign-On is currently limited to a small amount of TV providers, including Dish, GVTC Communications, Hotwire, and Sling TV.
Single Sign-On starts rolling out to iOS 10.2 and tvOS 10.1 beta users