Add anti-CSRF token

phpcs-errors:238 phpunit-status:successful

upload.php

@@ -3,8 +3,12 @@
 require_once __DIR__ . "/functions/functions.php";
 
 $target = "csv/";
-$target .= basename( $_FILES['uploaded']['name']);
-$targetpart = basename( $_FILES['uploaded']['name']);
+$target .= basename($_FILES['uploaded']['name']);
+$targetpart = basename($_FILES['uploaded']['name']);
+
+if (validateAntiCsrfToken() === false) {
+    throw new WrongCsrfTokenException();
+}
 
 //This is our size condition
 if ($uploaded_size > 40000000) {