How to Change User Accounts on Your WordPress Blog
After users register and settle into their accounts on your WordPress website or blog, you, as the site administrator, have the ability to edit their user information. You may never have to edit your WordPress user accounts at all; however, you have the option if you need it. Most often, users can access the details of their own accounts and change e-mail addresses, names, passwords, and so on; however, a site administrator may need to edit user accounts in the following types of situations:
Edit user roles: When a user registers, you may want to change her role, or level of access, to your site; promote an existing user to Administrator; or conversely, demote an existing Administrator or Editor down a notch or two.
Edit user e-mails: If a user loses access to the e-mail account that she registered with, she may ask you to change the account e-mail address so that she can access her account notifications again.
Edit user passwords: If a user loses access to the e-mail account with which she registered, she can’t use WordPress’s Lost Password feature, which allows users to gain access to their account password through e-mail recovery. In that case, a user may ask you to reset her password for her so that she can log in and access her account again.
When you hover over the name of the user, an Edit link appears below the user listing. Click that Edit link to access the Edit User page, where you can edit these pieces of information for that user:
Personal Options: These options include Visual Editor and Color Scheme preferences.
Name: Specify a user’s role, first and last name, and nickname.
Contact Info: Includes users’ e-mail addresses; websites; and AIM, Yahoo IM, and Google Talk IDs.
Biographical Info: A few lines of biographical info for the user (optional, but some WordPress themes display authors’ biographies).
New Password: Change the password for the user.
When users register on your website, you, as the administrator, get an e-mail notification (sent to the e-mail address you set on the General Settings page), so you always know when new users register, and you can then go into your Dashboard and edit the user to set his role any way you see fit.