@Rob32 hi there, for Amazon accounts your user name is normally your email or in some cases your phone number. If you go to primevideo.com and click on login, you'll be directed to where you input your details. Pop in your email address and select forgotten password. You'll get a notification to your email address then 👍 Hope this helps 😊
Click Forgot your password, and try the email address that you have.
Also check you spam folders !
