The testbed setup process creates a default user called elabman with the same password as root on boss at the time of install (the password hash is copied and stored in the database).
You should be able to login as elabman and automatically be presented with a "Create First Project" form. At the top of the page after "Contact US" you should see a green dot. Click this dot to enter into administrative mode. It should now be red and an administration menu item will appear.
You can now fill out the form to create the first project and user. The project will be automatically approved and created upon submission. You may now logout and login as the user you created for the first project.