It would look something like this:
Import-Module DataOnTap
$password = ConvertTo-SecureString "MySuperSecretPassword" -AsPlainText –Force
$cred = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList "root",$password
get-nalun | export-csv C:\LunReport.csv
Of course if you have multiple filers it will get a little more complicated.