How to use registerToGrid method in Appium

...15      logger.error("No data found in the node configuration file to send to the grid");16    }17  });18};19function registerToGrid(options_post, jsonObject) {20  request(options_post, function (error, response/*, body*/) {21    if (error !== null || response.statusCode !== 200) {22      logger.error("Request to register with grid was Unsuccessful...");23    } else {24      var logMessage = "Appium successfully registered with the grid on " + jsonObject.configuration.hubHost + ":" + jsonObject.configuration.hubPort;25      logger.debug(logMessage);26    }27  });28}29function postRequest(data, addr, port) {30  //parse json to get hub host and port31  var jsonObject;32  try {33    jsonObject = JSON.parse(data);34  } catch (e) {35    return logger.error("Syntax error in node configuration file: " + e.message);36  }37  // if the node config doesnt have the appium/webdriver url, host, and port,38  // automatically ad it based on how appium was init39  // otherwise, we will take whatever the user setup40  // because we will always set localhost/127.0.0.1. this won't work if your41  // node and grid aren't in the same place42  if (!jsonObject.configuration.url || !jsonObject.configuration.host || !jsonObject.configuration.port) {43    jsonObject.configuration.url = 'http://' + addr + ':' + port + '/wd/hub';44    jsonObject.configuration.host = addr;45    jsonObject.configuration.port = port;46    // re-serialize the configuration with the auto populated data47    data = JSON.stringify(jsonObject);48  }49  // prepare the header50  var post_headers = {51    'Content-Type'  : 'application/json'52  , 'Content-Length': data.length53  };54  // the post options55  var options_post = {56    url       : 'http://' + jsonObject.configuration.hubHost + ':' + jsonObject.configuration.hubPort + '/grid/register'57  , method  : 'POST'58  , body    : data59  , headers : post_headers60  };61  if (jsonObject.configuration.register !== true) {62    logger.debug("no registration sent ( " + jsonObject.configuration.register + " = false )");63  } else {64    var registerCycleTime = jsonObject.configuration.registerCycle;65    if (registerCycleTime !== null && registerCycleTime > 0) {66      //initiate a new Thread67      var first = true;68      logger.debug("starting auto register thread for grid. Will try to register every " + registerCycleTime + " ms.");69      setInterval(function () {70        if (first !== true) {71          isAlreadyRegistered(jsonObject, function (isRegistered) {72            if (isRegistered !== null && isRegistered !== true) {73              // make the http POST to the grid for registration74              registerToGrid(options_post, jsonObject);75            }76          });77        } else {78          first = false;79          registerToGrid(options_post, jsonObject);80        }81      }, registerCycleTime);82    }83  }84}85function isAlreadyRegistered(jsonObject, cb) {86  //check if node is already registered87  var id = "http://" + jsonObject.configuration.host + ":" + jsonObject.configuration.port;88  request({89    uri       : 'http://' + jsonObject.configuration.hubHost + ':' + jsonObject.configuration.hubPort +90      '/grid/api/proxy' + "?id=" + id91  , method  : "GET"92  , timeout : 1000093  }, function (error, response /*, body*/) {...