Get SharePoint user group and user details using Powershell

$SPWebCollection = $SPSite.AllWebs

$rootSite = $SPSite.RootWeb

foreach($SPGroup in $rootSite.Groups)
{
foreach($user in $SPGroup.users)
{
$users = new-object psobject
$users | add-member noteproperty -name "Group Name" -value $SPGroup.Name
$users | add-member noteproperty -name "User" -value $user
$users | add-member noteproperty -name "Display Name" -value $user.DisplayName

$email = GetInfo  $user
$users | add-member noteproperty -name "Work Email" -value $email
$combinedusers =[Array]$combinedusers + $users
}
}

        #Create CSV file
$filelocation=$filePath+"\"+$rootSite+".csv"
$combinedUsers | export-csv -path $filelocation -notype
$combinedUsers = $null