I am getting a 404 "Not Found" error in the console. What am I doing wrong?

// Problem: We need a simple way to look at a user's badge count and JavaScript points
// Solution: Use Node.js to connect to Treehouse's API to get profile information to print out

//require https module
const https = require('https');
const username = "chalkers";

//Function to print a message to the console
function printMessage(username, badgeCount, points) {
    const message = `${username} has ${badgeCount} total badge(s) and ${points} points in JavaScript`;
    console.log(message);
}

// Connect to the API url()
const request = https.get('https://teamtreehouse.com/${username}.json', (res) => {
    console.log('statusCode: ', res.statusCode);
    //read the data
    //parse the data
    //print the data

});