There are a couple messages that you can customize through the Accounts settings.
To administer these messages:
Click Messages under User Accounts in the administration menu.
The first mesage is Disabled Account Error. This message appears when a disabled user tries to login. Users with disabled accounts may not log in until their account is reactivated. You may edit this message to explain why they are not allowed to log in and you may also list what they need to do to get their account active once again.
The second message is Form: Account Login. This is the message that appears above the account login form. A sample message here could be "Please login to view our updated member list!"
The third is the Account Registration Form Message. This message is displayed when users create new accounts through your site. The registration form is displayed when they are prompted for a log in, and they follow a link that says "Register Now!" and also when they are creating a new account to use your site's E-commerce. Account signups can be disabled. If account signups are enabled, users will see this custom message when registering.
The fourth message to customize is Insufficient Site Viewing Privileges Message. This message appears when users attempt to view a page they do not have access to and are prompted for a login. This would apply, for example, if a user typed in the URL to an article that is secured and the user is not logged in.
