AWS S3Client构造函数调用参数不匹配错误，寻求技术解决方法

main.cpp: 在函数‘void downloadFile(const string&, const string&, std::ostream&)’中：
main.cpp:23:95: 错误：找不到匹配的函数调用‘Aws::S3::S3Client::S3Client(Aws::Auth::AWSCredentials, Aws::Client::ClientConfiguration&)’
Aws::S3::S3Client s3Client(Aws::Auth::AWSCredentials(ACCESS_KEY, SECRET_KEY), clientConfig);

来自main.cpp第3行包含的文件：
install/include/aws/s3/S3Client.h:100:9: 候选函数：‘Aws::S3::S3Client::S3Client(const std::shared_ptrAws::Auth::AWSCredentialsProvider&, const Aws::Client::ClientConfiguration&, Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy, bool, Aws::S3::US_EAST_1_REGIONAL_ENDPOINT_OPTION)’

S3Client(const std::shared_ptrAws::Auth::AWSCredentialsProvider& credentialsProvider,
install/include/aws/s3/S3Client.h:100:9: 说明：候选函数需要5个参数，仅提供了2个

你使用的AWS C++ SDK版本中，S3Client的构造函数已变更，不再直接接受AWSCredentials对象作为第一个参数，而是要求传入**std::shared_ptr<Aws::Auth::AWSCredentialsProvider>**类型的凭据提供者实例，同时需要补充剩余的可选参数（可使用默认值）。

1. 引入必需的头文件：取消注释#include <aws/core/auth/AWSCredentialsProvider.h>，因为要用到凭据提供者相关类。
2. 用BasicAWSCredentialsProvider包装密钥：该类是AWSCredentialsProvider的实现类，可直接传入ACCESS_KEY和SECRET_KEY生成实例，再转为shared_ptr。
3. 补充构造函数剩余参数：使用各参数的默认值即可满足基本需求。

#include <aws/lambda-runtime/runtime.h>
#include <aws/core/Aws.h>
#include <aws/s3/S3Client.h>
#include <aws/s3/model/GetObjectRequest.h>
#include <aws/core/auth/AWSCredentials.h>
#include <aws/core/client/ClientConfiguration.h>
#include <aws/core/auth/AWSCredentialsProvider.h>  // 取消注释该头文件

using namespace aws::lambda_runtime;

Aws::SDKOptions options;

static const char* ENDPOINT_URL = "endpoint";
static const char* ACCESS_KEY = "accesskey";
static const char* SECRET_KEY = "secretkey";

void downloadFile(const std::string& bucketName, const std::string& objectKey, std::ostream& outputStream) {
    Aws::Client::ClientConfiguration clientConfig;
    clientConfig.endpointOverride = ENDPOINT_URL;
    clientConfig.scheme = Aws::Http::Scheme::HTTP;
    clientConfig.connectTimeoutMs = 30000;
    clientConfig.requestTimeoutMs = 30000;
    clientConfig.region = "us-west-2";

    // 构造凭据提供者的shared_ptr
    auto credentialsProvider = std::make_shared<Aws::Auth::BasicAWSCredentialsProvider>(
        Aws::Auth::AWSCredentials(ACCESS_KEY, SECRET_KEY)
    );

    // 使用新的构造函数形式，补充默认参数
    Aws::S3::S3Client s3Client(
        credentialsProvider,
        clientConfig,
        Aws::Client::AWSAuthV4Signer::PayloadSigningPolicy::Never,  // 默认值
        false,  // 默认值：是否禁用chunked编码
        Aws::S3::US_EAST_1_REGIONAL_ENDPOINT_OPTION::NOT_SET  // 默认值
    );
}

内容的提问来源于stack exchange，提问作者user20208419