Upsert reward code external id

curl --request PATCH \
  --url https://api.oneofnone.io/v1/rewards/{id}/codes/{codeId}/external-id \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "discountId": "<string>",
  "codeId": "<string>",
  "error": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "rewardId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "code": "<string>",
  "reservedFor": "<string>",
  "redeemedBy": "<string>",
  "redeemedAt": "<string>",
  "orderId": "<string>",
  "externalOrderId": "<string>",
  "createdAt": "<string>",
  "expiresAt": "<string>",
  "updatedAt": "<string>",
  "externalIds": {
    "shopify": {
      "discountId": "<string>",
      "codeId": "<string>",
      "syncedAt": "<string>",
      "error": "<string>"
    },
    "stripe": {
      "discountId": "<string>",
      "codeId": "<string>",
      "syncedAt": "<string>",
      "error": "<string>"
    }
  }
}