gasで昨日のanalyticsで逆アクセス数リストを出してメールする

code.js

var scriptProperties = PropertiesService.getScriptProperties();
var yesterday = new Date();
yesterday.setDate(yesterday.getDate() - 1);
var date = Utilities.formatDate(yesterday, Session.getTimeZone(), 'yyyy-MM-dd');

function setScheduling() {
    var triggers = ScriptApp.getProjectTriggers();
    triggers.forEach(ScriptApp.deleteTrigger);
    ScriptApp.newTrigger("exec")
        .timeBased()
        .everyDays(1)
        .create();
}

function exec() {
    var subject = date + "の" + scriptProperties.getProperty("sitename") + "逆アクセス数";
    var message = runReport().join("\n");
    GmailApp.sendEmail(scriptProperties.getProperty("email"), subject, message);
}

var runReport = function () {
    var options = {
        'dimensions': 'ga:source',
        'sort': '-ga:pageviews',
        'filters': 'ga:medium==referral'
    };
    var report = Analytics.Data.Ga.get('ga:' + scriptProperties.getProperty("profileId"), date, date, 'ga:pageviews', options);
    return report.rows;
};