virsh list authentication

I am trying out some of the command line virsh and virt- commands on a RHEV host that contains KVM guests under RHEV 3.0 beta 4.   I am finding some of the command like virt-list-filesystems to be very nice.

But, "virsh list" asks for authentication user and password.   Does anyone know what user it is looking for?

Here is some output:

# virsh list
Please enter your authentication name: admin
Please enter your password:
error: Failed to reconnect to the hypervisor
error: no valid connection
error: authentication failed: authentication failed

# virsh list
Please enter your authentication name: root
Please enter your password:
error: Failed to reconnect to the hypervisor
error: no valid connection
error: authentication failed: authentication failed