Here is how you set up the GITHUB_CLIENT_ID and GITHUB_CLIENT_SECRET credentials that you need when using Github as an OAuth provider.
Navigate to the Developer Settings, OAuth Applications
To get there:
- Choose Settings from upper right drop down menu next to your personal avatar
- Find the Developer Menu, which is pretty far down the page on the left hand side. Find OAuth Apps on that menu.
- Click the “Register a New Application” button.