How to manage log in session through headless chrome?

Question

I want to create a scraper that:

1. opens a headless browser,
2. goes to a url,
3. logs in (there is steam oauth),
4. fills some inputs,

Answer 1

There is an option to save user data using the userDataDir option when launching puppeteer. This stores the session and other things related to launching chrome.

puppeteer.launch({
  userDataDir: "./user_data"
});

It doesn't go into great detail but here's a link to the docs for it: https://pptr.dev/#?product=Puppeteer&version=v1.6.1&show=api-puppeteerlaunchoptions