[Notifier][Smsc] Require login and password

Author: OskarStark

src/Symfony/Component/Notifier/Bridge/Smsc/SmscTransport.php

@@ -34,9 +34,9 @@ final class SmscTransport extends AbstractTransport
     private $password;
     private $from;
 
-    public function __construct(?string $username, ?string $password, string $from, HttpClientInterface $client = null, EventDispatcherInterface $dispatcher = null)
+    public function __construct(string $login, string $password, string $from, HttpClientInterface $client = null, EventDispatcherInterface $dispatcher = null)
     {
-        $this->login = $username;
+        $this->login = $login;
         $this->password = $password;
         $this->from = $from;