code: protected AuthenticationRiskContingencyResponse executeInternal(final Authentication authentication,
                                                                      final RegisteredService service,
                                                                      final AuthenticationRiskScore score,
                                                                      final HttpServletRequest request) {
          return null;
      }
docs: Execute authentication risk contingency plan.
  
  @param authentication the authentication
  @param service        the service
  @param score          the score
  @param request        the request
  @return the authentication risk contingency response. May be null.