Convert JSON files to CSV using PowerShell

convert.ps1

Set-Content ".\subscriptions.csv" -Value $null
#$subscriptions = [System.Collections.ArrayList]@()
Get-ChildItem ".\" -Filter *.json | 
Foreach-Object {
  $myJson = Get-Content $_.FullName -Raw | ConvertFrom-Json 
  foreach ($subscription in $myJson.data.subscriptions) {
    "$($subscription.id),$($subscription.subscriber.email_address)" | Add-Content ".\subscriptions.csv"
  }
}