You can control who can access protected directories by adding authorized users. Generally, at least one authorized user needs to be added, otherwise no-one will not be able to view the directory.
To add or modify an authorized user:
Click on the Password protect directories button on the home page.
Navigate to the required directory. Select a folder by clicking on the folder name link. Open a folder by clicking on the folder icon.
Enter the user's name in the Username field, and their password in the Password field.
Click on the Add New User button.