Facebook is the largest social media platform in existence, with well over 1 billion users worldwide. This means that there's a good chance that your users will have a Facebook account. Your app can register and link with their account, allowing you to use their Facebook credentials as a login for your app. Depending on the requested permissions, this will also allow you to access data such as user information, and pictures, and even give you the ability to access shared content. You can read more about the available permission options from the Facebook docs at https://developers.facebook.com/docs/facebook-login/permissions#reference-public_profile.
In this recipe, we will cover a basic method for logging into Facebook via an app to get a session token. We'll then use that token to access the basic /me endpoint provided by Facebook's Graph...
