Query SharePoint Changelog in Azure PS Function

QueryChangeLog.ps1

Write-Output "PowerShell Timer trigger function executed at:$(get-date)";
if($inTokenBlob){
  $persistedToken = Get-Content $inTokenBlob
  Write-Output "Persisted token: $persistedToken"
}

#Get creds from environment variables (in Azure app settings)
$secpasswd = ConvertTo-SecureString $env:SPO_P -AsPlainText -Force
$mycreds = New-Object System.Management.Automation.PSCredential ($env:SPO_U, $secpasswd)
$controlUrl = $env:SPO_ControlUrl

#Connect to control site
Connect-PnPOnline -Url $controlUrl -Credentials $mycreds
$context = Get-PnPContext

#Get list to check for changes
$list = Get-PnPList -Identity "List Name"

#Create an empty ChangeQuery object
$cq = new-object Microsoft.Sharepoint.Client.ChangeQuery($false,$false)

if($persistedToken){
  #We have a persisted change token from the last run - use it to set the starting point for the current run
  $lastToken = new-object Microsoft.Sharepoint.Client.ChangeToken
  $lastToken.StringValue = $persistedToken
  $cq.ChangeTokenStart = $lastToken
}
#Set the ChangeQuery settings (the things/events to check for changes)
$cq.Item = $true
$cq.DeleteObject = $true

#Use the ChangeQuery on the list
$changes = $list.GetChanges($cq)
$context.Load($changes)
Execute-PnPQuery

#Now we have the changes
$changeArray = @()
$delete = $false
foreach ($change in $changes)  
{
  if ($change.GetType().Name -eq 'ChangeItem')
  {
    $delete = $true
    #Push the list item Id to an array
    $changeArray += $change.ItemId
  }
}
if($delete){
  #Write the changeArray as a comma-separated list to the queue binding
  Set-Content -Path $outMsg -Value ($changeArray -join ",")
  #Update the persisted change token with the last change processed
  Set-Content -Path $outTokenBlob -Value $changes[$changes.Count - 1].ChangeToken.StringValue -Force
  Write-Output "Items deleted - message created: $changeArray"
}