HBO GO is asking me to register again when I already have a profile
If you're prompted to register again for HBO GO when you sign in, you'll need to enter a new HBO GO ID for your HBO GO profile. You can leave the email field blank.
The HBO GO ID is a unique name associated with your HBO GO profile and is not used to sign in to HBO GO.
Note: If you continue to get prompted to create a new profile, please email HBO GO customer support.