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/admin.rs

@@ -403,7 +403,7 @@ async fn delete_user(user_id: UserId, token: AdminToken, mut conn: DbConn) -> Em
 
     for membership in memberships {
         log_event(
-            EventType::OrganizationUserRemoved as i32,
+            EventType::OrganizationUserDeleted as i32,
             &membership.uuid,
             &membership.org_uuid,
             &ACTING_ADMIN_USER.into(),