docs: function getCaptcha(req, config, ip, reversePrefix, cb) {
      let res = {};
      if (!config.FIRST_PARTY_ENABLED) {
          res = {
              status: 200,
              header: {key: 'Content-Type', value:'application/javascript'},
              body: ''
          };
          return cb(null, res);
      } else {
          const searchMask = `/${reversePrefix}${config.FIRST_PARTY_CAPTCHA_PATH}`;
          const regEx = new RegExp(searchMask, 'ig');
          const pxRequestUri =  `/${config.PX_APP_ID}${req.originalUrl.replace(regEx, '')}`;
          config.logger.debug(`Forwarding request from ${req.originalUrl} to xhr at ${config.CAPTCHA_HOST}${pxRequestUri}`);
          const callData = {
              url: `https://${config.CAPTCHA_HOST}${pxRequestUri}`,
              headers: pxUtil.filterSensitiveHeaders(req.headers, config.SENSITIVE_HEADERS),
              timeout: config.API_TIMEOUT_MS
          };
          callData.headers['host'] = config.CAPTCHA_HOST;
          callData.headers[config.ENFORCER_TRUE_IP_HEADER] = ip;
          callData.headers[config.FIRST_PARTY_HEADER] = 1;
          request.get(callData, config, (error, response) => {
              if (error || !response) {
                  config.logger.error(`Error while fetching first party captcha: ${error}`);
              }
  
              response = response || {statusCode: 200, headers: {}};
              res = {
                  status: response.statusCode,
                  headers: response.headers,
                  body: response.body || ''
              };
              return cb(null, res);
          });
      }
      return;
  }