curl --request POST \
  --url https://checkout.dintero.com/v1/sessions/{session_id}/klarna/callback/{callback_ref} \
  --header 'Content-Type: application/json' \
  --data '
{
  "authorization_token": "<string>",
  "session_id": "<string>"
}
'

{
  "error": {
    "message": "<string>",
    "code": "<string>",
    "errors": [
      {}
    ]
  }
}