Octomixer is the easiest way to find Github information on users and organizations. Just add it as a dependency and you're good to go!
TODO: I'll add a simple example app here, that uses the Octomixer package.
Octomixer uses a headless browser to download the HTML source code for Github's various pages, then it scrapes the relevant information from it. In the end, you just receive a simple Elixir hash to save, write to a file, or whatever you'd like.