/**
* Invalidates the current session.
*
* Clears all session attributes and flashes and regenerates the
* session and deletes the old session from persistence.
*
* @param int $lifetime Sets the cookie lifetime for the session cookie. A null value
* will leave the system settings unchanged, 0 sets the cookie
* to expire with browser session. Time is in seconds, and is
* not a Unix timestamp.
* @return bool True if session invalidated, false if error.
* @static
*/
public static function invalidate($lifetime = null)
{
return \Illuminate\Session\Store::invalidate($lifetime);
}