Description of problem:

running cinder credentials will show user credentials returned from auth. 
it would be helpful to expand this command and allow admins to query a specific user's credentials. 

Version-Release number of selected component (if applicable):

openstack-cinder-2013.1.2-3.el6ost.noarch

How reproducible:

100%

Steps to Reproduce:
1. as user admin run: cinder help credentials 
2.
3.

Actual results:

there is no option to query other users 

Expected results:

user admin should be able to get info for other users. 

Additional info: