Configuration options

The configuration, you need to define once in your app. The best place for that will be in your extension to Application class.
Configuration properties:

Property	Description	Must/Optional	Default Value
app id	Application id	Must
namespace	Application namespace	Must
permissions	Set of permissions you want to use on login	Must
default audience	Decide who will see your published posts	Optional	FRIENDS
login behaviour	Descide what to use: SSO or not	Optional	SSO_WITH_FALLBACK
all at once	Ask from user all permissions at once	Optional	false
graph version	Support older graph versions. like 'v2.3'	Optional	latest