To get into the CUE GUI, try creating/changing any user's password to something. Make him a part of Administrators group. Then log in with this user ID.
To create a user - username bcde create
To change a user's password - username johndoe password 12345
To make him a part of Administrators (note the case of Administrators) - username bcde group Administrators
Then log into the GUI using bcde/12345