public static function send_welcome_mail($user,$code)
{
    Mail::send('auth.email.welcome',['user'=>$user,'code'=>$code], function ($message)
    {
        $message->subject('Welcome');
        $message->from('info@example.com', 'Example');
        $message->to('info@exampleReceiver.com');
    });
}

public static function send_welcome_mail($user,$code,$receiver)
{
    Mail::send('auth.email.welcome',['user'=>$user,'code'=>$code], function ($message)
    {
        $message->subject('Welcome');
        $message->from('info@example.com', 'Example');
        $message->to($receiver);
    });
}