CUPS, access configuration in Debian

[Tong <mlist4suntong@yahoo.com>]

Hi, 

I was able to lprm my own printer jobs until today when I was
prompt with a password request:

$ lprm 810
Password for tong on localhost? 
lprm: Unable to cancel job(s)!

How to configure CUPS in Debian so that such password requests are
not necessary for my own jobs and root account? 

Thanks