找不到SmackAndroid（上下文）用户搜索模块ejabberd

我正在使用windows上的ejabberd-17.01服务器开发基于android的聊天应用程序。在android上使用Smack 4.1。我想使用以下代码搜索用户

public void searchUser(){
    try {
        UserSearchManager userSearchManager = new UserSearchManager(connection);
        Collection<String> services = userSearchManager.getSearchServices();
        if(services.isEmpty()){
            return;
        }
        Form searchForm = userSearchManager.getSearchForm(services.iterator().next());
        Form answerForm = searchForm.createAnswerForm();
        answerForm.setAnswer("Name", true);
        answerForm.setAnswer("search", "test"); // here i'm passsing the Text value to search

        ReportedData resultData;
        resultData = userSearchManager.getSearchResults(answerForm, "search." + connection.getServiceName());

        Iterator<ReportedData.Row> it = (Iterator)resultData.getRows();
        ReportedData.Row row = null;
        while (it.hasNext()) {
            String value = it.next().toString();
            Log.i("Iteartor values......", " " + value);
            System.out.println("Jabber_id :" + row.getValues("jid").toString());
            System.out.println("Name :" + row.getValues("Name").toString());
            row = it.next();
        }
    }
    catch (SmackException.NoResponseException | SmackException.NotConnectedException | XMPPException.XMPPErrorException | XmppStringprepException e){
        Log.w("app" , e.toString());
    }
}

我还测试了smack文档中提到的所有依赖项，但找不到此方法。我遗漏了什么，或者是否有其他方法可以在ejabberd中搜索注册用户。另外，我想知道我是否需要将任何模块添加到ejabberd以用于搜索目的，就像在openfire server中手动添加搜索模块一样

compile "org.igniterealtime.smack:smack-im:4.1.0"
compile "org.igniterealtime.smack:smack-android:4.1.0"
compile "org.igniterealtime.smack:smack-tcp:4.1.0"
compile "org.igniterealtime.smack:smack-extensions:4.1.0"