GAS oatuh1への変更方法をお教えください

function myFunction() {
  ss = SpreadsheetApp.getActiveSpreadsheet();
  SpreadsheetApp.setActiveSheet(ss.getSheets()[0]);

  as = SpreadsheetApp.getActiveSheet();

  kesu = null;
  as.getRange("A4:H800").setValue(kesu);



  searchWord = as.getRange("F1").getValue();
  if (searchWord != "") {
     Logger.log("F1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("G1").getValue();
  if (searchWord != "") {
     Logger.log("G1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("H1").getValue();
  if (searchWord != "") {
     Logger.log("H1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("I1").getValue();
  if (searchWord != "") {
     Logger.log("I1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("J1").getValue();
  if (searchWord != "") {
     Logger.log("J1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("K1").getValue();
  if (searchWord != "") {
     Logger.log("K1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("L1").getValue();
  if (searchWord != "") {
     Logger.log("L1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("M1").getValue();
  if (searchWord != "") {
     Logger.log("M1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("N1").getValue();
  if (searchWord != "") {
     Logger.log("N1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("O1").getValue();
  if (searchWord != "") {
     Logger.log("O1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("P1").getValue();
  if (searchWord != "") {
     Logger.log("O1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("Q1").getValue();
  if (searchWord != "") {
     Logger.log("O1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("R1").getValue();
  if (searchWord != "") {
     Logger.log("O1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("S1").getValue();
  if (searchWord != "") {
     Logger.log("O1");
     search(searchWord, 0);
  }

  searchWord = as.getRange("T1").getValue();
  if (searchWord != "") {
     Logger.log("O1");
     search(searchWord, 0);
  }


}


/**
 * TwitterのOAuth設定
 */
function setOAuth() {
  var oAuthConfig = UrlFetchApp.addOAuthService("twitter");
  oAuthConfig.setAccessTokenUrl("https://api.twitter.com/oauth/access_token");
  oAuthConfig.setRequestTokenUrl("https://api.twitter.com/oauth/request_token");
  oAuthConfig.setAuthorizationUrl("https://api.twitter.com/oauth/authorize");
  oAuthConfig.setConsumerKey(UserProperties.getProperty("TWITTER_CONSUMER_KEY"));
  oAuthConfig.setConsumerSecret(UserProperties.getProperty("TWITTER_CONSUMER_SECRET"));
}

/**
 * Twitterでキーワード検索したツイートをスプレッドシートに展開する
 *
 * @param query 検索キーワード
 * @param sheetNum シート番号
 */
function search(query, sheetNum) {

  if (query == "") {
    return;
  }

  query = encodeURIComponent(query);

  var url, options, response, jsonString, json, tweets = [],
      ss, as, cell, firstId, lastRow, row = 0, id, result, col, dd ,ff;

  // Twitter Search APIのURL
  var API_URL = "https://api.twitter.com/1.1/search/tweets.json?";

  try {

    setOAuth();

    url = API_URL + "count=50"
                  + "&q=" + query;
    options = {
      "oAuthServiceName": "twitter",
      "oAuthUseToken":    "always"
    };

    try {
      response = UrlFetchApp.fetch(url, options);
    } catch(e) {
      Logger.log(e);
      return;
    }

    if (!response) {
      Logger.log("no response");
      return;;
    }

    jsonString = response.getContentText();
    json       = Utilities.jsonParse(jsonString);
    tweets     = json.statuses;

    if (tweets.length === 0) {
      Logger.log("no tweets");
      return;
    }

    // 保存するシートを指定する
    ss = SpreadsheetApp.getActiveSpreadsheet();
    SpreadsheetApp.setActiveSheet(ss.getSheets()[sheetNum]);

    as = SpreadsheetApp.getActiveSheet();
    cell = as.getRange("A4");
    firstId = tweets[tweets.length - 1].id_str;

    row = 0;

    lastRow = as.getLastRow();

    // 取得済みのツイートを上書きしないように出力開始行を設定する
    for (var i = 0; i < lastRow; i++) {

      id = cell.offset(i, 0).getValue();
      Logger.log(id + ":" + firstId);

      if(firstId == id || !id) {
        break;
      }
      row++;
    }

    Logger.log("row");
    Logger.log(row);

    //重複確認
    if (lastRow == 3) {
      lastRowDate = null;
      lastRowText = null;
    } else {
      lastRowDate = cell.offset(lastRow-4, 1).getValue();
      lastRowText = cell.offset(lastRow-4, 2).getValue();
      lastRowUser = cell.offset(lastRow-4, 4).getValue();
    }

    // D1セルに最終行の日時を表示
    as.getRange("D1").setValue(lastRowDate);

    // スプレッドシートに出力
    for (var i = tweets.length - 1; i >= 0; i--) {

        result = tweets[i];
        col = 0;
        dd = new Date(result.created_at);

        // E1セルに取得中のtweetの日付を入れる
        as.getRange("E1").setValue(dd);

    //    if (lastRowDate <= dd) {
          if (lastRowText == null || (lastRowText != result.text && lastRowUser != 'https://twitter.com/' + result.user.screen_name)) {
            ff = "";
            cell.offset(row, col++).setValue(result.id_str);
            ff = result.id_str + "%%x%%";
            cell.offset(row, col++).setValue(dd);
            ff = ff + dd + "%%x%%";
            cell.offset(row, col++).setValue(result.user.name);
            ff = ff + result.user.name  + "%%x%%";
            cell.offset(row, col++).setValue(result.text);
            ff = ff + result.text + "%%x%%";
            cell.offset(row, col++).setValue('https://twitter.com/'
                                             + result.user.screen_name
                                             + "/status/"
                                             + result.id_str);
            ff = ff + "https://twitter.com/" + result.user.screen_name + "/status/" + result.id_str + "%%x%%";
            cell.offset(row, col++).setValue('https://twitter.com/'
                                             + result.user.screen_name);
            ff = ff + "https://twitter.com/" + result.user.screen_name + "%%x%%";
            if (result.entities.urls.length > 0) {
              cell.offset(row, col++).setValue(result.entities.urls[0].expanded_url);
              ff = ff + result.entities.urls[0].expanded_url + "%%x%%";
            }
            else {
              cell.offset(row, col++).setValue("");
              ff = ff + "%%x%%";
            }
            cell.offset(row, col++).setValue(ff);
            row++;
          }
    //    }
    }

  } catch (e) {
    Logger.log(e);
  }
}