Adding Attribute

I have done this for computer objects to see if the computer is a member of an AD group. Here is the extension attribute code:

#!/bin/sh
Computer_Name=$(hostname)

Machine_Domain=$(dscl /Active Directory/ -read . SubNodes | awk '{print $2}')

AD_Groups=`dscl "/Active Directory/$Machine_Domain/All Domains" -read "/Computers/$Computer_Name$" |grep memberOf`

if [[ "$AD_Groups" =~ "AD Group Name" ]]; then
     echo "<result>Yes</result>"
else
    echo "<result>No</result>"
fi

You can get the username and use something like dscl "domain" -read "/Users/<username>/<attribute>/"

Thank you! Would you know how to configure this for attributes with dial_in enabled?