We'll store and retrieve the Measurement ID & API Secret from your browser's local storage, ensuring they remain private and secure. They won't be transmitted to our servers, so we won't have access to this information.
Items Array (Optional)
Console

URL endpoint   

https://www.google-analytics.com/mp/collect?measurement_id=&api_secret=

Payload   

{
  "client_id": "",
  "events": [
    {
      "name": "refund",
      "params": {
        "currency": "",
        "transaction_id": "",
        "value": "",
        "items": []
      }
    }
  ]
}