亚马逊 api 集成 - 卖家账户 -.Net C #- 下载订单并添加产品

Question

我尝试连接到亚马逊 api 以添加产品和下载订单，但在 C# 中收到错误响应。

{
"errors": [
{
"message": "Access to requested resource is denied.",
"code": "Unauthorized",
"details": ""
}
]
}

我的脚步

1. 在应用程序列表中的卖家账户上，select 应用程序，在 LWA 凭据列中，单击查看

它将客户端标识符值写入变量 _clientId。 它将客户端密码值写入变量 _clientSecret。

2. 在应用程序列表中的卖家账户上，select 应用程序，在 Action 列中，单击箭头和 Autorize，在下一步中生成刷新令牌并写入变量 _refreshToken

3. 我以 IAM 用户身份登录 aws，我将转到我的安全凭证，在下一步中我创建访问密钥。

它将访问密钥 ID 值写入变量 _secretKey。

4.在应用程序列表中的卖家账户上，select 应用程序，将列IAM ARN值写入变量_roleArn

我的代码 C#：

    string resource = "/orders/v0/orders";
    
                    RestClient restClient = new RestClient(_url);
    
                    IRestRequest restRequest = new RestRequest(resource, Method.GET);
    
                    LWAAuthorizationCredentials lwaAuthorizationCredentials = new LWAAuthorizationCredentials
                    {
                        ClientId = _clientId,
                        ClientSecret = _clientSecret,
                        RefreshToken = _refreshToken,
                        Endpoint = new Uri("https://api.amazon.com/auth/o2/token"),
    
                    };
    
                    restRequest.AddQueryParameter("MarketplaceIds", "A1PA6795UKMFR9");
                    restRequest = new LWAAuthorizationSigner(lwaAuthorizationCredentials).Sign(restRequest);
    
    
                    var credentials = new BasicAWSCredentials(_accessKeyId, _secretKey);
                    var client = new AmazonSecurityTokenServiceClient(credentials);
    
                    var assumeRoleRequest = new AssumeRoleRequest()
                    {
                        DurationSeconds = 3600,
                        RoleArn =_roleArn,
                        RoleSessionName = DateTime.Now.Ticks.ToString()
                    };
    
                    AssumeRoleResponse assumeRoleResponse = client.AssumeRole(assumeRoleRequest);
    
    
                    AWSAuthenticationCredentials aws = new AWSAuthenticationCredentials();
                    aws.AccessKeyId = _accessKeyId;
                    aws.SecretKey = _secretKey;
                    aws.Region = "eu-west-1";
    
                    AWSSigV4Signer signer = new AWSSigV4Signer(aws);
                    signer.Sign(restRequest, restClient.BaseUrl.Host);
    
                    var response = restClient.Execute(restRequest);
    
                    if (response.StatusCode == System.Net.HttpStatusCode.OK)
                    {
                        Console.WriteLine(response.Content);
                    }
                    else
                    {
                        Console.WriteLine(response.StatusCode);
                        Console.WriteLine(response.Content);
    
                    }

什么可能导致错误谢谢您的帮助