ResourceCleaner.ps1

workflow ResourceCleaner
{
    Param
    (
        [Parameter(Mandatory=$true)]
        [String]
        $TargetTagName,
        [Parameter(Mandatory=$true)]
        [String]
        $SubscriptionName
    )
    $connectionName = "AzureRunAsConnection"

    try
    {
         # Get the connection
        $servicePrincipalConnection=Get-AutomationConnection -Name $connectionName

        "Logging in to Azure..."
        Connect-AzAccount `
        -ServicePrincipal `
        -TenantId $servicePrincipalConnection.TenantId `
        -ApplicationId $servicePrincipalConnection.ApplicationId `
        -CertificateThumbprint $servicePrincipalConnection.CertificateThumbprint   
    }
    catch 
    {
        if (!$servicePrincipalConnection)
        {
            $ErrorMessage = "Connection $connectionName not found."
            throw $ErrorMessage
        } else{
            Write-Error -Message $_.Exception
            throw $_.Exception
        }
    }


    if($SubscriptionName)
    {
        try
        {
            $Subscriptions = Get-AzSubscription -SubscriptionName $SubscriptionName
        }
        catch
        {
            $ErrorMessage = "Subscription $SubscriptionName not found."
            throw $ErrorMessage
        }
    }

    Set-AzContext -Subscription $SubscriptionName

    $GetDateMMddyyyy = Get-Date -Format "MM/dd/yyyy"
    "Removing resources for $GetDateMMddyyyy"
    $ResourcesToRemove = Get-AzResource -TagName $TargetTagName -TagValue $GetDateMMddyyyy
    $ResourcesToRemove | ForEach-Object {
        $ResourceName = $_.Name
        "Removing $ResourceName"
        Remove-AzResource -ResourceId $_.ResourceId -Force
    }
    
    $RemoveTrue = "true"
    "Removing marked resources"
    $ResourcesToRemove = Get-AzResource -TagName $TargetTagName -TagValue $RemoveTrue
    $ResourcesToRemove | ForEach-Object {
        $ResourceName = $_.Name
        "Removing $ResourceName"
        Remove-AzResource -ResourceId $_.ResourceId -Force
    }
}