Send data from gravity forms to GoogleSheets

Question

I'm using this code to submit data to 3rd party (GoogleSheets in this case) after form submission, the form I'm using has is '4', when I submit the form, the user is added but the data don't go to the Sheet for some reason:

add_action('gform_after_submission_4', 'add_to_google_spreadsheet', 10, 2);

function add_to_google_spreadsheet($entry, $form) {



$post_url = 'https://script.google.com/macros/s/xxxxxxxxxxx/exec';

$body = array('Phone' => rgar($entry, '2'), 'Email' => rgar($entry, '4'),);

$request = new WP_Http();
$response = $request->request($post_url, array('method' => 'POST', 'sslverify' => false, 'body' => $body));
}

this is the code I'm using for GoogleSheet web app

function doPost(e) {

  if (!e) return;

  var sheetID = "xxxxxxxxxxxxxxx";  // Replace this with the Google Spreadsheet ID
  var sheetName = "test";       // Replace this with the sheet name inside the Spreadsheet

  var status = {};

  // Code based on Martin Hawksey (@mhawksey)'s snippet

  var lock = LockService.getScriptLock();
  lock.waitLock(30000);

  try {

    var sheet = SpreadsheetApp.openById(sheetID).getSheetByName(sheetName);
    var headers = sheet.getRange(1, 1, 1, sheet.getLastColumn()).getValues()[0];

    // Add the data and time when the Gravity Form was submitted
    var column, row = [],
      input = {
        "timestamp": new Date()
      };

    for (var keys in e.parameter) {
      input[normalize_(keys)] = e.parameter[keys];
    }

    for (i in headers) {
      column = normalize_(headers[i])
      row.push(input[column] || "");
    }

    if (row.length) {

      sheet.appendRow(row);
      status = {
        result: "success",
        message: "Row added at position " + sheet.getLastRow()
      };

    } else {
      status = {
        result: "error",
        message: "No data was entered"
      };
    }

  } catch (e) {

    status = {
      result: "error",
      message: e.toString()
    };

  } finally {

    lock.releaseLock();

  }

  return ContentService
    .createTextOutput(JSON.stringify(status))
    .setMimeType(ContentService.MimeType.JSON);

}

function normalize_(str) {
  return str.replace(/[^\w]/g, "").toLowerCase();
}

here is google error after user submit

object(WP_Http)#4(0){

}array(6){
    ["headers"]=>object(Requests_Utility_CaseInsensitiveDictionary)#1256(1){
        ["data": protected]=>array(3){
            ["content-type"]=>string(24)"text/html; charset=UTF-8"["content-length"]=>string(4)"1555"["date"]=>string(29)"Thu, 20 Oct 2016 19:42:33 GMT"
        }
    }["body"]=>string(1555)" 
400. That’s an error.

Your client has issued a malformed or illegal request. That’s all we know. "["response"]=>array(2){
        ["code"]=>int(400)["message"]=>string(11)"Bad Request"
    }["cookies"]=>array(1){
        [0]=>object(WP_Http_Cookie)#1251(5){
            ["name"]=>string(3)"NID"["value"]=>string(131)"89=xxxxxxxxx_"["expires"]=>int(1492803753)["path"]=>string(1)"/"["domain"]=>string(10)"google.com"
        }
    }["filename"]=>NULL["http_response"]=>object(WP_HTTP_Requests_Response)#1260(5){
        ["response": protected]=>object(Requests_Response)#1257(10){
            ["body"]=>