Delete DEPROVISIONED okta users using API

Okta tombstones its users and does not delete them automatically when they are deactivated in AD. I use the below script to run on schedule with an okta API token to delete users:
You'll need the okta powershell module install and be a super user on okta :
https://github.com/okta/oktasdk-csharp/tree/master/Okta.Core.Automation/

#Import module okta
Import-Module Okta.Core.Automation
 
#COnnect to okta  using token and domain
Connect-Okta -Token alphanumerictoken -FullDomain "https://domain.okta.com"
 
 
###################Logging function
$Logfile = "$env:ProgramData\InstallLogs\DeleteOktaUsers_$(get-date -format `"yyyyMMdd_hhmmsstt`").log"
Function LogWrite($string, $color)
{
   if ($Color -eq $null) {$color = "white"}
   write-host $string -foregroundcolor $color
   $string | out-file -Filepath $Logfile -append
}
 
if ((Test-Path -path C:\ProgramData\InstallLogs\) -ne $True)
{
New-Item C:\ProgramData\InstallLogs\ -type directory
}
 
########################################
 
 
#get a list of all DEPROVISIONED users
$AllUsers = Get-OktaUser -Filter 'status eq "DEPROVISIONED"'


#list neatly in a csv file located in C:\programdata\InstallLogs
$AllUsers | Select @{L="FirstName";E={$_.profile.firstName}},`
@{L="LastName";E={$_.profile.lastName}},`
@{L="UserName";E={$_.profile.login}},`
@{L="ID";E={$_.id}},@{L="UserStatus";E={$_.Status}} | FT | Out-File "$env:ProgramData\InstallLogs\deprovisionedusers_$(get-date -format `"yyyyMMdd_hhmmsstt`").csv"
 
 
#loop through the list of deprovisioned users and delete log deletions to the logfile
foreach($user in $AllUsers){
   
    Delete-OktaUser $user.Profile.Login
    If($? -eq "True") {
     LogWrite "Successfully deleted user $user" green
     }
}