Getting Gmail message by message ID (X-GM-MSGID) with node-imap

gistfile1.txt

var Imap = require('imap');
var crypto = require("crypto");
var inspect = require('util').inspect;

function xoauth2 () {
    var authData = [
        '[email protected]',
        'auth=Bearer ' + 'ysadfffeDoedTjyUjS-sample-access-token-65aHk9CrnQAN96hxLLD6HTg',
        '',
        ''
    ];
    return new Buffer(authData.join('\x01'), 'utf-8').toString('base64');
}

imap = new Imap({
    user: '[email protected]',
    xoauth2: xoauth2(),
    host: 'imap.gmail.com',
    port: 993,
    tls: true
});

/**
 * Gmail's system folders:
 * INBOX
 * [Gmail]/All Mail
 * [Gmail]/Drafts
 * [Gmail]/Sent Mail
 * [Gmail]/Spam
 * [Gmail]/Starred
 * [Gmail]/Trash
 */
function openInbox(cb) {
    imap.openBox('[Gmail]/Drafts', true, cb);
}

imap.once('ready', function() {
    openInbox(function(err, box) {
        if (err) throw err;
        imap.search([ ['X-GM-MSGID', '1486579858850663946'] ], function (err, results) {

            if (err) {
                console.log(err);
                return;
            }

            var f = imap.fetch(results[0], {
                request: {
                    headers: ['from', 'to', 'subject', 'date'],
                    bodies: 'HEADER.FIELDS (FROM TO SUBJECT DATE)',
                    struct: true
                }
            });

            f.on('message', function(msg, seqno) {
                console.log('Message #%d', seqno);
                var prefix = '(#' + seqno + ') ';
                msg.on('body', function(stream, info) {
                    var buffer = '';
                    stream.on('data', function(chunk) {
                        buffer += chunk.toString('utf8');
                    });
                    stream.once('end', function() {
                        console.log(prefix + 'Parsed header: %s', inspect(Imap.parseHeader(buffer)));
                    });
                });
                msg.once('attributes', function(attrs) {
                    console.log(prefix + 'Attributes: %s', inspect(attrs, false, 8));
                });
                msg.once('end', function() {
                    console.log(prefix + 'Finished');
                });
            });
            f.once('error', function(err) {
                console.log('Fetch error: ' + err);
            });
            f.once('end', function() {
                console.log('Done fetching all messages!');
                imap.end();
            });
        });
    });
});

imap.connect();