A bit, maybe
You really need a test user (or even more than one) to make sure you have permissons set correctly and get a feel for the user experience.
The userid is not important, you'll hardly ever see it on the forum, and most users don't even notice there is such a thing. If it is really that important to you, create a test user now, and rename them later for one of your mods, change the e-mail-adress and let the mod choose a new passoword via the forgot password functionality.