Adding groups manually to Apple Apache Sites

<Directory "/Volumes/Server HD/Web/ELA">
        AuthType Basic
        AuthName "Browse access /Volumes/Server HD/Web/ELA"
        <Limit PUT DELETE PROPPATCH PROPFIND MKCOL COPY MOVE LOCK UNLOCK>
          Require no-user
        </Limit>
        <Limit GET HEAD OPTIONS CONNECT POST>
          Require group gse-readonly
        </Limit>
        <IfDefine !WEBSERVICE_ON>
            Deny from all
            ErrorDocument 403 /customerror/websitesoff403.html
        </IfDefine>
    </Directory>