curl --request POST \
  --url 'https://api.stateset.com/api/v1/ap/bills' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "due_date": "string",
  "items": [
    {
      "account_code": null,
      "description": "string",
      "po_line_id": null,
      "quantity": "string",
      "tax_rate": null,
      "unit_price": "string"
    }
  ],
  "memo": null,
  "payment_terms": null,
  "purchase_order_id": null,
  "reference_number": null,
  "supplier_id": "string"
}'

{
  "amount_due": "string",
  "amount_paid": "string",
  "bill_number": "string",
  "created_at": "string",
  "currency": "string",
  "due_date": "string",
  "id": "string",
  "status": "string",
  "subtotal": "string",
  "supplier_id": "string",
  "tax_amount": "string",
  "total_amount": "string"
}