What is my Disney plus username and password?

If you've purchased a Disney+ subscription online, the next step is to create an account on the service. Your account will be prepopulated with your email address, so you can use this as your login name and password. Then, review your subscriber agreement and Privacy Policy to protect your Disney+ password. Once you have the account, you can access the content of your account on a mobile device by downloading the Disney+ app and signing in with your login to your Disney plus account.

See also - https://myblogtime.com/how-do-i-log-into-disney-plus-on-my-tv/