delete user from a group when admin

src/Application/Actions/Group/DeleteUserGroupAction.php

+<?php
+declare(strict_types=1);
+
+namespace App\Application\Actions\Group;
+use App\Domain\Group\GroupNotFoundException;
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use App\Domain\Group\Group ;
+
+class DeleteUserGroupAction extends GroupAction
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function action(): Response
+    {
+        $groupId = (int) $this->resolveArg('id');
+        $group = $this->groupRepository->find($groupId);
+
+        $user_id = (int) $this->resolveArg('user_id');
+
+        if (!isset($group)) {
+            throw new GroupNotFoundException();
+        }
+        
+        if (!$group->checkAdmin($user_id))
+        {
+            return $this->response
+            ->withHeader('Location', '/groups/' . $groupId)
+            ->withStatus(302);
+        }
+
+        $user = $this->userRepository->find($user_id);
+        $user->removeGroup($group);
+
+        $this->em->persist($group);
+        $this->em->flush();
+
+        $this->logger->info("User has been deleted in group.");
+        $this->flash->addMessage('delete_user', 'User have been deleted in group.');
+
+        return $this->response
+            ->withHeader('Location', '/groups/' . $groupId)
+            ->withStatus(302);
+    }
+
+}