如何在HtmlUnit测试用例中添加用户名/密码认证信息？

import com.gargoylesoftware.htmlunit.CredentialsProvider;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.WebRequest;
import com.gargoylesoftware.htmlunit.WebResponse;
import com.gargoylesoftware.htmlunit.WebClientOptions;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

public class HtmlUnitAuthenticationExample {
    public static void main(String[] args) throws Exception {
        // 创建WebClient对象
        WebClient webClient = new WebClient();

        // 创建CredentialsProvider对象
        CredentialsProvider credentialsProvider = new DefaultCredentialsProvider();

        // 将CredentialsProvider对象设置给WebClient对象
        webClient.setCredentialsProvider(credentialsProvider);

        // 创建WebClientOptions对象
        WebClientOptions options = webClient.getOptions();

        // 启用认证信息
        options.setUseInsecureSSL(true);
        options.setThrowExceptionOnFailingStatusCode(false);
        options.setThrowExceptionOnScriptError(false);

        // 创建WebRequest对象
        WebRequest request = new WebRequest(new URL("http://example.com"));

        // 添加用户名和密码认证信息
        credentialsProvider.addCredentials("username", "password");

        // 发送请求并获取响应
        HtmlPage page = webClient.getPage(request);
        WebResponse response = page.getWebResponse();

        // 打印响应内容
        System.out.println(response.getContentAsString());

        // 关闭WebClient
        webClient.close();
    }
}