Why do I keep getting an "is not valid JSON" message

const https = require("https");
const http = require("http");

// Print the data
function printMessage(username, badgeCount, points) {
    const message = `${username} has ${badgeCount} total badge(s) and ${points} points in JavaScript`;
    console.log(message);
}
function printError(error) {
    console.error(error.message);
}

function getProfile(username) {
    // Connect to the API URL (https://teamtreehouse.com/csalgado.json)
    const request = https.get(
        `https://teamtreehouse.com/${username}.json`,
        (response) => {
            let body = "";
            // Read the data
            response.on("data", (data) => {
                body += data.toString();
            });
            response.on("end", () => {
                try {
                    // Parse the data
                    let profile = JSON.parse(body);

                    printMessage(
                        username,
                        profile.badges.length,
                        profile.points.JavaScript
                    );
                } catch (error) {
                    printError(error);
                }
            });
        }
    );
    request.on("error", (error) => printError(error));
}
const users = process.argv.slice(2);
users.forEach(getProfile);