Implement basic database access and login

src/Frontend/BaseController.php

@@ -0,0 +1,21 @@
+<?php
+declare(strict_types=1);
+
+namespace MailAccountAdmin\Frontend;
+
+use MailAccountAdmin\Common\UserHelper;
+use Slim\Views\Twig;
+
+class BaseController
+{
+    /** @var Twig */
+    protected $view;
+    /** @var UserHelper */
+    protected $userHelper;
+
+    public function __construct(Twig $view, UserHelper $userHelper)
+    {
+        $this->view = $view;
+        $this->userHelper = $userHelper;
+    }
+}