Please contact your TV Provider. Pac-12 Networks has no ability to recover or troubleshoot TV Provider sign-in information.
When you sign in using your TV Provider username/password, you are actually signing in with the TV Provider, and it tells the Pac-12 Now app to grant you access to the broadcast content. The authentication process occurs on your provider's website, not Pac-12 Networks or Pac-12 Now. We do not store or have any knowledge about your TV Provider username/password.
You can find customer support contact information for several of Pac-12 Networks leading providers here at Pac-12.com.