I have an application using the Graph API. I have it creating events for the user, but would like to let the user invite their friends from our site instead of having to go
The possibility to invite users to an Event was removed in v2.4 of the Graph API:
The Event node no longer supports GET operations on the endpoints /v2.4/{event_id}/invited, /v2.4/{event_id}/likes, or /v2.4/{event_id}/sharedposts.
There is no way to invite users to an Event anymore, you have to use facebook.com instead.