public void RevokeItem(string itemInstanceId)
        {
            var revokeRequest = new AdminModels.RevokeInventoryItemRequest();

            revokeRequest.PlayFabId      = playFabId;
            revokeRequest.CharacterId    = characterId;
            revokeRequest.ItemInstanceId = itemInstanceId;
            PlayFabAdminAPI.RevokeInventoryItem(revokeRequest, RevokeItemCallback, PfSharedControllerEx.FailCallback("RevokeInventoryItem"));
        }