instafeed.js stopped working: The access_token provided is invalid

I am using instafeed.js like so:

var feed = new Instafeed({
        get: 'user',
        userId: 19191919191,
        limit: 9,
        accessToken: 'myaccesstokenhere',
        target: 'instagram',
        resolution: 'standard_resolution',
        after: function() {
            var el = document.getElementById('instagram');
            if (el.classList)
                el.classList.add('show');
            else
                el.className += ' ' + 'show';
        }
});

but I am getting this error:

The access_token provided is invalid.

I got the access_token by https://www.instagram.com/developer I registered my application and put the Client Secret as the accessToken and I got my userID from here https://smashballoon.com/instagram-feed/find-instagram-user-id/

but its still saying The access_token provided is invalid. what am I doing wrong?