function __construct($assoc_handle, $signed, $invalidate_handle = null)
{
$this->assoc_handle = $assoc_handle;
$this->signed = $signed;
if ($invalidate_handle !== null) {
$this->invalidate_handle = $invalidate_handle;
}
$this->namespace = Auth_OpenID_OPENID2_NS;
$this->message = null;
}