Link NHL account to Apple purchase

I purchased a subscription to NHL Gamecenter using my fingerprint on my iPhone and I try logging into my account on my Xbox and Apple TV and my Apple login does not work. I've seen in the past there should be some sort of link accounts setting but I'm not seeing it. Does anyone know how to link your apple account to NHL (not Rogers account)? Very frustrating to have to watch all these on my phone.

Tyler