Add os header

Author: DominikWolos

src/Exception/UserComServerException.php

@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * This file has been created by developers from BitBag.
+ * Feel free to contact us once you face any issues or want to start
+ * You can find more information about us on https://bitbag.io and write us
+ * an email on hello@bitbag.io.
+ */
+
 declare(strict_types=1);
 
 namespace BitBag\SyliusUserComPlugin\Exception;