Can't access HBO Max purchased through iPhone when not at home
I purchased HBO Max through my phone. I have an active subscription I can see under "Subscriptions," and it is debited from my bank account as "RECURRING PAYMENT AUTHORIZED ON [date] APPLE.COM/BILL 866-712-7753 CA." It works on my home TV. I am traveling and would like to use it on my laptop, but I can't log in through HBO Max because HBO Max doesn't recognize my email. I tried logging into Apple TV, but it doesn't give me an HBO Max option. I tried logging in through my cable provider, but that didn't work either. What am I missing? How can I watch HBO Max purchased through my iPhone? When I contacted HBO Max for support, they said to contact Apple.
MacBook Air 13″