curl --request POST \
  --url 'https://api.stateset.com/api/v1/vendor-returns' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "items": [
    {
      "product_id": "string",
      "quantity": "string",
      "reason": null,
      "unit_cost": "string"
    }
  ],
  "notes": null,
  "purchase_order_id": null,
  "supplier_id": "string"
}'

{
  "created_at": "string",
  "credit_generated": true,
  "id": "string",
  "number": "string",
  "status": "string",
  "supplier_id": "string",
  "total_credit": "string"
}