// ----------------------------------------------------
    // ルームに観戦者として入る
    // ----------------------------------------------------
    public void OnClick()
    {
        ApiClient.Instance.ResponseCreateSpectatorEntry = ResponseCreateSpectatorEntry;
        var param = new RequestCreateSpectatorEntry();

        param.room_id    = room_id;
        UserInfo.room_id = room_id;
        ApiClient.Instance.RequestCreateSpectatorEntry(param);
    }
        /// <summary>
        ///     RequestCreateSpectatorEntry
        ///     /api/rooms/:room_id/spectator_entriesへPOSTでリクエストを行なう
        /// </summary>
        public void RequestCreateSpectatorEntry(RequestCreateSpectatorEntry param)
        {
            var url = ipAddr + string.Format("/api/rooms/{0}/spectator_entries", param.room_id);

            requester.Post(url, param, ResponseCreateSpectatorEntry);
        }