[TASK] Refactoring SpreadsheetController

src/Controller/SpreadsheetController.php

@@ -7,15 +7,13 @@ use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 use Slim\Psr7\Stream;
 
-class SpreadsheetController
+class SpreadsheetController extends BaseController
 {
     protected $spreadsheet;
-    protected $container;
 
     function __construct(ContainerInterface $container)
     {
-        $this->container = $container;
-
+        parent::__construct($container);
         $this->spreadsheet = new Spreadsheet();
         $this->spreadsheet->getProperties()
             ->setCreator("Christian Seyfferth")