Powershell Script to empty admin recyle bin in SharePoint

a script wherein if we give an user name for ex Deleted By "Bai,Mala(Mala)",it should delete the all the files which were deleted by user.

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

$siteURL = "your site url"

$site= New-Object microsoft.sharepoint.spsite($siteURL)

$query = new-object Microsoft.SharePoint.SPRecycleBinQuery;

$query.ItemState = “FirstStageRecycleBin”;

$itemcoll = $site.GetRecycleBinItems($query);

#Delete items those are deleted by Mala

$files= $itemcoll | where {$_.DeletedByName -match "your name"}

#Delete output

foreach ($file in $files) {

$site.RecycleBin.Delete($file.ID)

}