add and use new event types (#5482)

* add additional event_types

* use correct event_type when leaving an org

* use correct event type when deleting a user

* also correctly log auth requests

* add correct membership info to event log

src/api/core/organizations.rs

@@ -251,7 +251,7 @@ async fn leave_organization(org_id: OrganizationId, headers: Headers, mut conn:
             }
 
             log_event(
-                EventType::OrganizationUserRemoved as i32,
+                EventType::OrganizationUserLeft as i32,
                 &member.uuid,
                 &org_id,
                 &headers.user.uuid,