What is an Access Token & how does it work?

When someone connects with an app using Facebook Login, the app will be able to obtain an access token which provides temporary, secure access to Facebook APIs. An access token is an opaque string that identifies a user, app, or page and can be used by the app to make graph API calls (A valid access token is required in order to use Likepana). Access tokens are obtained via a number of methods. The token includes information about when the token will expire and which app generated the token. Because of privacy checks, the majority of API calls on Facebook need to include an access token. Please remember to treat your access token as if it was a password and DO NOT share it with anyone.