'use strict';

// Configuring the Articles module
angular.module('users.admin').run(['Menus',
  function (Menus) {
    Menus.addSubMenuItem('topbar', 'admin', {
      title: 'Manage Users',
      state: 'admin.users',
      icon: 'supervisor_account'
    });
  }
]);

'use strict';

// Configuring the Articles module
angular.module('users.admin').run(['Menus',
  function (Menus) {
    Menus.addSubMenuItem('topbar', 'admin', {
      title: 'Manage Users',
      state: 'admin.users'
    });
  }
]);

--- 
+++ 
@@ -5,7 +5,8 @@
   function (Menus) {
     Menus.addSubMenuItem('topbar', 'admin', {
       title: 'Manage Users',
-      state: 'admin.users'
+      state: 'admin.users',
+      icon: 'supervisor_account'
     });
   }
 ]);
Add icon in the admin submenu item
