code: public AuthenticationService getAuthenticationService(SecurityService securityService) {
  		if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
  			SibTr.entry(tc, CLASS_NAME + "getAuthenticationService", securityService);
  		}
  		if(_authenticationService == null) {
  			if (securityService != null)
  				_authenticationService = securityService
  						.getAuthenticationService();
  		}
  		if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
  			SibTr.exit(tc, CLASS_NAME + "getAuthenticationService", _authenticationService);
  		}
  		return _authenticationService;
  	}
docs: Get Authentication Service from the Liberty Security component
  It will get the AuthenticationService only if the SecurityService is activated
  @param securityService
  @return