如何用C语言使用cloudamqp对paho mqtt订阅者客户端进行认证？

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "MQTTClient.h"

#define ADDRESS     "tcp://your-broker-address:1883"
#define CLIENTID    "ExampleClientSub"
#define TOPIC       "your-topic"
#define QOS         1
#define TIMEOUT     10000L

int main(int argc, char* argv[])
{
    MQTTClient client;
    MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
    int rc;

    MQTTClient_create(&client, ADDRESS, CLIENTID, MQTTCLIENT_PERSISTENCE_NONE, NULL);
    conn_opts.keepAliveInterval = 20;
    conn_opts.cleansession = 1;

    // 设置用户名和密码
    conn_opts.username = "your-username";
    conn_opts.password = "your-password";

    if ((rc = MQTTClient_connect(client, &conn_opts)) != MQTTCLIENT_SUCCESS)
    {
        printf("Failed to connect, return code %d\n", rc);
        exit(EXIT_FAILURE);
    }

    MQTTClient_subscribe(client, TOPIC, QOS);

    // 等待消息到达
    printf("Waiting for messages...\n");
    while(1)
    {
        // 处理消息
    }

    MQTTClient_disconnect(client, 10000);
    MQTTClient_destroy(&client);
    return rc;
}