boolean logoutAuthN ( authnBean,  
  javax.servlet.http.HttpServletRequest req,
  javax.servlet.http.HttpServletResponse resp,
  java.lang.String resumePath)     
  throws AuthnAdapterException,

PingFederate invokes the logoutAuthN() method during an SLO request to terminate a user's session with the external application. The HttpServletResponse and resumePath objects are available to support scenarios where redirection of the user's browser is needed to an additional service to clean up any remaining sessions.