FIX: fixed route to UserManagement@getOverview

app/Http/routes.php

@@ -42,7 +42,7 @@ Route::group([
          ->name('users.detail');
 
     // display list of all users registered into our system
-    Route::get('admin/users/overview/{state?}', 'UsersManagement@getOverview')
+    Route::get('admin/users/overview/{state?}', 'UserManagement@getOverview')
          ->name('users.overview');
 
     // POST methods

app/Providers/AdminProvider.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Providers;
+
+use Illuminate\Support\ServiceProvider;
+
+class AdminProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap the application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        // create instance of main menu
+        \Menu::create('mainMenu', function ($menu) {
+            /**
+             * @var $menu \Pingpong\Menus\MenuBuilder
+             */
+
+            // create menu entries
+
+            /*
+             * WARNING: MenuBuilder::route() does not seem to work,
+             * nor route() helper function. We need to use action() helper instaed.
+            */
+            $menu->url(action('Admin\Dashboard@getIndex'), trans('admin/mainMenu.dashboard'), 1, ['icon' => 'fa fa-dashboard']);
+            $menu->dropdown(trans('admin/mainMenu.userManagement'), function($sub) {
+                $sub->url(action('Admin\UserManagement@getNewUser'), trans('admin/mainMenu.newUser'), 1, ['icon' => 'fa fa-user-plus']);
+                $sub->url(action('Admin\UserManagement@getOverview', ['state' => 'all']), trans('admin/mainMenu.usersOverview'), 2, ['icon' => 'fa fa-users']);
+
+            }, ['icon' => 'fa fa-users']);
+        });
+
+        // create menu with user profile
+        \Menu::create('profileMenu', function ($menu) {
+            // @todo add profile menu
+        });
+    }
+
+    /**
+     * Register the application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+    }
+}