function show_user_manager()
 {
     $display = '';
     $security = login::loginCheck('edit_all_users', true);
     if ($security === true) {
         if (isset($_GET['delete'])) {
             $sucess = user_managment::delete_user(intval($_GET['delete']));
             if ($sucess !== true) {
                 $display .= $sucess;
             }
         }
         if (isset($_GET['add_user'])) {
             $display .= user_managment::show_quick_edit_bar();
             $display .= user_managment::add_user();
         } elseif (isset($_GET['edit'])) {
             $display .= user_managment::show_quick_edit_bar();
             $display .= user_managment::edit_user(intval($_GET['edit']));
         } elseif (isset($_POST['action']) && $_POST['action'] == 'createNewUser') {
             $display .= user_managment::show_quick_edit_bar();
             $display .= user_managment::create_user();
         } elseif (isset($_POST['lookup_field']) && $_POST['lookup_value'] != '') {
             $display .= user_managment::show_quick_edit_bar();
             $display .= user_managment::lookup();
         } else {
             $display .= user_managment::show_quick_edit_bar();
             if (isset($_POST['filter'])) {
                 $display .= user_managment::show_users($_POST['filter']);
             } else {
                 $display .= user_managment::show_users();
             }
         }
     } else {
         if (isset($_GET['edit'])) {
             $display .= user_managment::edit_user(intval($_GET['edit']));
         }
     }
     return $display;
 }