Promotion for 'administrator'. How?

I am an administrator of my shop. I wish to buy something on a regular basis and to arrange myself a generous discount. I go to “Promotions”, create a new Promotion, then I try to create a ‘Condition’: if a ‘user’= my name, then discount = xx%. But! … I am not listed as a user, I can see all my registered users, but none of administrators are in the list, although we bought from the shop before. What is the workaround?