My provider isn't listed
Your provider is who you signed up through or who bills you for HBO Max.
How do you get HBO Max?
How did you sign up?
If you signed up through an appstore (Apple, Google Play, Roku, Samsung TV), you need to sign in with your HBO Max account (instead of choosing Sign in with a Provider).
The first time you sign in to HBO Max, choose Sign in with a provider and then choose who you subscribe through (for steps, see Sign in with a provider). Once you have an HBO Max account, you'll sign in with your HBO Max email and password.