JSFiddle - React, Tailwind, and code Playground

HTML

<div id="output"></div>

JavaScript

var userName = 'me';

var txt = "{authenticationToken: 1, authenticated: 2, authenticationTokenExpiry: 3,sessionTimeoutMinutes: 4,userName: '" + userName + "'}"; 

var obj = eval('(' + txt + ')'); 

var ele = document.getElementById('output');

for(var prop in obj){
    var output = '{ ' + prop + ' : ' + obj[prop] + ' }<br>';    
    ele.innerHTML = ele.innerHTML + output;
}