public ConnectionIdentity execute(UpdateSignalrConnectionRequest update_request)
        {
            set_request(update_request)
                .find_connected_user()
                .update_connected_user_in_repository()
                .Commit();

            return new ConnectionIdentity() { connection_id = connected_user.ID };
        }
 private UpdateSignalrConnection set_request(UpdateSignalrConnectionRequest update_request)
 {
     request = Guard.IsNotNull(update_request, "create_request");
     return this;
 }