我有一个函数，用于列出特定角色中与特定元键值匹配的用户。当我直接在页面上使用它时，它会起作用---

<?php 
$bmail = $current_user->user_email;
   $user_query = new WP_User_Query( array( \'meta_key\' => \'broker_email\', \'meta_value\' => $bmail,  \'fields\' => \'all\'  ) );
   $users = $user_query->get_results();

  if (!empty($users)) {
    echo \'<ul>\';
    foreach ($users as $user){
        echo \'<li>\' . $user->display_name . \'</li>\';
    }
    echo \'</ul>\';
  } else {
    echo \'No users found\';
  };
?>

function thebroker_agents() {
  global $current_user;
$bmail = $current_user->user_email;
   $user_query = new WP_User_Query( array( \'meta_key\' => \'broker_email\', \'meta_value\' => $bmail,  \'fields\' => \'all\'  ) );
   $users = $user_query->get_results();
  if (!empty($users)) {
    echo \'<ul>\';
    foreach ($users as $user){
        echo \'<li>\' . $user->display_name . \'</li>\';
    }
    echo \'</ul>\';
  } else {
    echo \'No users found\';
  }
// Adds the above function as as shortcode
add_shortcode( \'your_agents\', \'thebroker_agents\' );

<?php echo do_shortcode(\'[your_agents]\'); ?>

我的shortcode函数有什么错？