token data is returned in fragment/hash part of the url. You have to parse the url’s hash in order to read the token.
Sample code using with Javascript:

let result = window.location.hash.substr(1).split('&').reduce(function (result, item) {
            var parts = item.split('=');
            result[parts[0]] = parts[1];
            return result;
        }, {});
console.log(result);