First you want to create a .htaccess file in the directory that you want to protect.  Below is the format you want to use when creating your .htaccess file.

AuthUserFile /home/username/.passwd
AuthGroupFile /home/username/.group
AuthName Protected
AuthType Basic
<Limit GET>
require group groupname
require user username
</Limit>

Second you need to email websupport@web-hosting-servers.net to install the webmister program on your domain.  The webmister program is an online web-based application that manages the usernames and passwords for your .htaccess files.