Unable to get BuyerCustomizedInfo in GetOrderItemsBuyerInfoWithResponse

[quanlndzt]

Hey team.
I try to get buyer customer infomation but it not work
The result always return empty

This is my code testing:

package main

import (
	"context"
	"fmt"
	"net/http"

	"github.com/amzapi/selling-partner-api-sdk/ordersV0"
	sp "github.com/amzapi/selling-partner-api-sdk/pkg/selling-partner"

	"github.com/google/uuid"
	"github.com/pkg/errors"
)


var (
	ClientID     = "Your ClientID"
	ClientSecret = "Your ClientSecret"
	RefreshToken = "Your RefreshToken"
	orderId = "Your OrderId"
)


func main() {

	sellingPartner, err := sp.NewSellingPartner(&sp.Config{
		ClientID:     ClientID,
		ClientSecret: ClientSecret,
		RefreshToken: RefreshToken,
	})

	if err != nil {
		panic(err)
	}

	endpoint := "https://sellingpartnerapi-na.amazon.com"

	seller, err := ordersV0.NewClientWithResponses(endpoint,
		ordersV0.WithRequestBefore(func(ctx context.Context, req *http.Request) error {
			req.Header.Add("X-Amzn-Requestid", uuid.New().String()) //tracking requests
			err = sellingPartner.AuthorizeRequest(req)
			if err != nil {
				return errors.Wrap(err, "sign error")
			}

			return nil
		}),
	)

	if err != nil {
		panic(err)
	}

	ctx := context.Background()
	resp, err := seller.GetOrderItemsBuyerInfoWithResponse(ctx, orderId, &ordersV0.GetOrderItemsBuyerInfoParams{})


	if err != nil {
		fmt.Println("[GetOrderItemsBuyerInfoWithResponse] err : ", err)
		panic(err)
	}

	
	fmt.Println(string(resp.Body))
}

The example result . BuyerCustomizedInfo always is empty

{"payload":{"OrderItems":[{"OrderItemId":"98587589265001","BuyerCustomizedInfo":{}}],"AmazonOrderId":"113-8246998-1524200"}}

Go version: go version go1.22.2 linux/amd64
amzapi/selling-partner-api-sdk latest
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