public function execute()
    {
        $connection = $this->sftp->open(
                    array(
                        'host' => 'myhostname',
                        'username' => 'myusername',
                        'password' => 'mypassword',
                        'port' =>22,
                        'passive' => true
                    )
                );
        if($connection){
        echo "true";

        }else{
            echo "false";
        }
                //print_r($connection);
        die;