Yes, it's one of the most popular feature requests. We don't support auth yet, but it's on our shortlist and we hope to have it ready soon.
of course, if this was an offline product, or self-hosted product, then it would solve that problem of auth instantly.
The approach I took was to hijack the Cookies from the browser once the user has signed in after on e.g. Facebook via the browser extension.
The route of proxying the website does in fact do away with the need to install any external 3rd libraries.
This browser extension I built coupled with the web service its integrated to does allow for scraping of pages from Facebook, Google and LinkedIn logged in pages as well.
https://chrome.google.com/webstore/detail/krakeio/ofncgcgajh...