GMAIL to Discord Channel Webhook Tutorial

function postDiscord(postMessage) {    const webhooks = 'https://discord.com/api/webhooks/webhooks/{webhook.id}/{webhook.token}';    const channel = '{channel name}';    const parse = 'full';    const method = 'post';    const payload = {        channel: channel,        content: postMessage,        parse: parse,    };    const params = {        method: method,        payload: payload,        muteHttpExceptions: true,    };    response = UrlFetchApp.fetch(webhooks, params);}function sendMailsToDiscord() {    const searchQuery = '{gmail query}';    const date = new Date();    const checkSpan = 30;    date.setMinutes(date.getMinutes() - checkSpan);    const threads = GmailApp.search(searchQuery);    const msgs = GmailApp.getMessagesForThreads(threads);    for (let i = 0; i < msgs.length; i++) {        const lastMsgDate = threads[i].getLastMessageDate();        if (lastMsgDate.getTime() < date.getTime()) break;        for (let j = 0; j < msgs[i].length; j++) {            const msgDate = msgs[i][j].getDate();            const msgBody = msgs[i][j].getPlainBody();            const subject = msgs[i][j].getSubject();            const postMessage =                'From mailing list' +                '
' +                Utilities.formatDate(msgDate, 'America/New_York', 'MM/DD/yyyy hh:mm:ss') +                '
' +                'Title:' +                subject +                '
' +                '[hr]' +                msgBody;            // 2000 Characters limits            if (postMessage.length > 2000) {                const stopPos = 1900; //                const msg = '"Exceeded 2000 character limit."';                postMessage = postMessage.substring(0, stopPos) + '
' + msg;            }            postDiscord(postMessage);        }    }}