def kill_user_sessions(request: Request, user: IUser, operation: str): """Notify session to drop this user. :param request: Pyramid request. :param user: User. :param operation: Operation triggering the killing of user sessions. """ user.last_auth_sensitive_operation_at = now() e = events.UserAuthSensitiveOperation(request, user, operation) request.registry.notify(e, request)