docs: public void displaySelectionPage(HttpServletRequest request, HttpServletResponse response, SocialTaiRequest socialTaiRequest) throws IOException {
          setRequestAndConfigInformation(request, response, socialTaiRequest);
          if (selectableConfigs == null || selectableConfigs.isEmpty()) {
              sendDisplayError(response, "SIGN_IN_NO_CONFIGS", new Object[0]);
              return;
          }
          generateOrSendToAppropriateSelectionPage(response);
      }