puppeteer-discord.js

const { launch } = require("puppeteer");

(async () => {
  // Launch puppeteer instance

  console.log("Launching Puppeteer browser...");

  const browser = await launch({
    headless: "new"
  });
  //In the near future `headless: true` will default to the new Headless mode headless: "new"
  const page = await browser.newPage();
  const discordToken = process.env.DISCORD_TOKEN; // Your Discord Token, How To Get Your Discord Token -> https://www.youtube.com/watch?v=YEgFvgg7ZPI&ab_channel=GaugingGadgets
  //Added env variable to secure token
  // Local Storage error with Puppeteer, found bypass, CREDIT: https://gist.github.com/zelbov/58e9fbbe5157bf61067d2693118dd09a

  const bypassLocalStorageOverride = (page) =>
    page.evaluateOnNewDocument(() => {
      // Preserve localStorage as separate var to keep it before any overrides
      let __ls = localStorage;

      // Restrict closure overrides to break global context reference to localStorage
      Object.defineProperty(window, "localStorage", {
        writable: false,
        configurable: false,
        value: __ls,
      });
    });

  console.log(
    "Redirecting to https://discord.com/app ... (May take a few seconds)"
  );

  // Calling function before storing token into Discord so that errors don't occur
  bypassLocalStorageOverride(page);

  await page.goto("https://discord.com/app");

  // Setting token into Discord Local Storage (Don't worry it's not being sent/stored anywhere, this is how Discord does it)
  await page.evaluate((token) => {
    localStorage.setItem("token", `"${token}"`);
  }, discordToken);

  // Navigate to a page where you want to use the local storage value
  await page.goto(""); // The discord channel / App Authorization that you want to log into Discord for...
  console.log("Successfully logged in...");

  await page.waitForTimeout(5000); // Wait for page to load 
  // Do whatever you want here afterwards, I just decided to take a screenshot for proof
  await page.screenshot({ path: "output.png" });

  // Ending proccess
  await browser.close();
})();

I found this gist here:
https://gist.github.com/listingclown3/7d5ac6e42a0cdc5ce85f28ededa3106b

Made my own changes and posted for myself.

Hi, I got an error when applied your code

Redirecting to https://discord.com/app ... (May take a few seconds)
ProtocolError: Protocol error (Page.navigate): Cannot navigate to invalid URL

ProtocolError: Protocol error (Page.navigate): Cannot navigate to invalid URL

await page.goto("");
Dont leave this empty.