> For the complete documentation index, see [llms.txt](https://docs.commercelayer.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.commercelayer.io/how-tos/placing-orders/payments/klarna/sending-back-the-authorization-token.md).

# Sending back the authorization token

## Problem

Your customer has [authorized the purchase on Klarna](https://docs.klarna.com/klarna-payments/api-call-descriptions/authorize-the-purchase/) through the client SDK. You need to create the order on Klarna with the authorization token returned by the client to proceed with the payment flow.

## Solution

To create an order on Klarna you have to update the Klarna payment object first. To do that, send a `PATCH` request to the `/api/klarna_payments/:id` endpoint, filling the `auth_token` attribute returned by the client SDK.

### Example

{% tabs %}
{% tab title="Request" %}
The following request updates the Klarna payment source identified by the "ertHJlpPTR" ID with the `auth_token` received from the client:

```javascript
curl -g -X PATCH \
  'http://yourdomain.commercelayer.io/api/klarna_payments/ertHJlpPTR' \
  -H 'Accept: application/vnd.api+json' \
  -H 'Authorization: Bearer your-access-token' \
  -H 'Content-Type: application/vnd.api+json' \
  -d '{
  "data": {
    "type": "klarna_payments",
    "id": "ertHJlpPTR",
    "attributes": {
      "auth_token": "0b1d9815-165e-42e2-8867-35bc03789e00"
    }
  }
}'
```

{% endtab %}

{% tab title="Response" %}
On success, the API responds with a `200 OK` status code, returning the updated Klarna payment object:

```javascript
{
  "data": {
    "id": "ertHJlpPTR",
    "type": "klarna_payments",
    "links": {
      "self": "https://yourdomain.commercelayer.io/api/klarna_payments/ertHJlpPTR"
    },
    "attributes": {
      "auth_token": "0b1d9815-165e-42e2-8867-35bc03789e00",
      "payment_request_data": {
        "client_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.ewogICJzZXNzaW9uX2lkIiA6ICIw",
        "payment_method_categories": [
          {...}
        ],
        "session_id": "0b1d9815-165e-42e2-8867-35bc03789e00"
      },
      "payment_response": {},
      "payment_instrument":{...},
      "created_at": "2018-01-01T12:00:00.000Z",
      "updated_at": "2018-01-01T12:00:00.000Z",
      "reference": null,
      "reference_origin": null,
      "metadata": {}
    },
    "relationships": {
      "order": {
        "links": {...}
      }
    },
    "meta": {
      "mode": "test",
      "organization_id": "Op2qQrRsSt",
      "trace_id": "4d7e0f3a6b9c2d5e8f1a4b7c0d3e6f9a2b5c8d1e4f7a0b3c6d9e2f5a8b1c4d7e0"
    }
  },
  "meta": {
    "mode": "test",
    "organization_id": "Op2qQrRsSt",
    "trace_id": "4d7e0f3a6b9c2d5e8f1a4b7c0d3e6f9a2b5c8d1e4f7a0b3c6d9e2f5a8b1c4d7e0"
  }
}
```

{% endtab %}
{% endtabs %}

## More to read

See our documentation if you need more information on how to [update a Klarna payment](https://docs.commercelayer.io/developers/v/api-reference/klarna_payments/update). See our Checkout guide for more details on how to place an order.

{% content-ref url="/pages/-LyDmx1SH-gJp8DstXnO" %}
[Placing the order](/how-tos/placing-orders/checkout/placing-the-order.md)
{% endcontent-ref %}


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