Credentials for windows iot

I’m trying to change the default application on the windows iot kit.
When I try to login the appManager ( I receive the attached window.
Could you please provide me the default user/password used for the image on the board?
Do you have any tutorial explaining in details the steps to change the default app on the board?

alt text

You find the getting started information on this developer website.

Username and password are:

  • User: Administrator
  • Password: p@ssw0rd