Container for an application session. The Context contains all application state for a session of your application. This includes Actors, Users, Assets, and other state.
The onStarted event is raised after the Context is fully initialized and ready for your application logic to start executing.
The onStopped event is raised before the Context starts shutting down, which happens after the last user disconnects.
The onUserJoined event is raised after a new user has joined the Context.
The 'onUserLeft event is raised when the given user has left the Context. After the last user leaves, the Context will be shutdown (and a 'stopped' event will soon follow).
Exits this context.