code: public StandardSession createSession(Properties defaultUserSettings) {
  		StandardSession session = new StandardSession(this, sessionTimeout, defaultUserSettings);
  		synchronized (sessions) {
  			synchronized (sessionsMirror) {
  				sessions.put(session.getToken(), session);
  				sessionsMirror.put(session.getToken(), session);
  			}
  		}
  		System.out.println(new LogEntry("session " + session + " created"));
  		return session;
  	}
docs: Creates and registers a session.
  
  @param defaultUserSettings
  @return