Just bought an ATV4. I live in an apartment complex and get my internet via an xfinity hotspot using my sister's credentials. It works great on iPhone, but when I try to connect to it with atv, it doesn't come up with the login screen. Like many wifi hotspots, it shows up as "unlocked" on the icon but you still have to login or agree to T&C, etc. How do I get past this on the ATV4? Did I just waste $200?