Allowing new users to register by using the WordPress registration interface is only one way to add users to your site. As the site Administrator, you have the ability to add new users manually by following these steps:
The Add New User page, shown in Figure 4-2, loads.
You can't skip this text box. The new user types in this username when he's prompted to log in to your site.
You can't skip this text box, either. The user receives notifications from you and your site at this e-mail address.
WordPress asks you to type the password twice as a way of authenticating the password (making sure that you typed it correctly the first time). WordPress provides a strength indicator that gives you an idea of how strong, or secure, your chosen password is. You want secure passwords so that no one can easily guess them, so make the password at least seven characters long and use a combination of letters, numbers, and symbols (such as @, #, $, and ^).