first upload all files

Modules/User/Sidebar/SidebarExtender.php

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+<?php
+
+namespace Modules\User\Sidebar;
+
+use Maatwebsite\Sidebar\Item;
+use Maatwebsite\Sidebar\Menu;
+use Maatwebsite\Sidebar\Group;
+use Modules\Admin\Sidebar\BaseSidebarExtender;
+
+class SidebarExtender extends BaseSidebarExtender
+{
+    public function extend(Menu $menu)
+    {
+        $menu->group(trans('admin::sidebar.system'), function (Group $group) {
+            $group->item(trans('user::sidebar.users'), function (Item $item) {
+                $item->weight(5);
+                $item->icon('fa fa-users');
+                $item->route('admin.users.index');
+                $item->authorize(
+                    $this->auth->hasAccess('admin.users.index') || $this->auth->hasAccess('roles.index')
+                );
+
+                // users
+                $item->item(trans('user::sidebar.users'), function (Item $item) {
+                    $item->weight(5);
+                    $item->route('admin.users.index');
+                    $item->authorize(
+                        $this->auth->hasAccess('admin.users.index')
+                    );
+                });
+
+                // roles
+                $item->item(trans('user::sidebar.roles'), function (Item $item) {
+                    $item->weight(10);
+                    $item->route('admin.roles.index');
+                    $item->authorize(
+                        $this->auth->hasAccess('admin.roles.index')
+                    );
+                });
+            });
+        });
+    }
+}