/// <summary>
        /// Creates a gift card activity. For more information, see .
        /// [GiftCardActivity](https://developer.squareup.com/docs/gift-cards/using-gift-cards-api#giftcardactivity) and .
        /// [Using activated gift cards](https://developer.squareup.com/docs/gift-cards/using-gift-cards-api#using-activated-gift-cards)..
        /// </summary>
        /// <param name="body">Required parameter: An object containing the fields to POST for the request.  See the corresponding object definition for field details..</param>
        /// <returns>Returns the Models.CreateGiftCardActivityResponse response from the API call.</returns>
        public Models.CreateGiftCardActivityResponse CreateGiftCardActivity(
            Models.CreateGiftCardActivityRequest body)
        {
            Task <Models.CreateGiftCardActivityResponse> t = this.CreateGiftCardActivityAsync(body);

            ApiHelper.RunTaskSynchronously(t);
            return(t.Result);
        }
        /// <summary>
        /// Creates a gift card activity. For more information, see .
        /// [GiftCardActivity](https://developer.squareup.com/docs/gift-cards/using-gift-cards-api#giftcardactivity) and .
        /// [Using activated gift cards](https://developer.squareup.com/docs/gift-cards/using-gift-cards-api#using-activated-gift-cards)..
        /// </summary>
        /// <param name="body">Required parameter: An object containing the fields to POST for the request.  See the corresponding object definition for field details..</param>
        /// <param name="cancellationToken"> cancellationToken. </param>
        /// <returns>Returns the Models.CreateGiftCardActivityResponse response from the API call.</returns>
        public async Task <Models.CreateGiftCardActivityResponse> CreateGiftCardActivityAsync(
            Models.CreateGiftCardActivityRequest body,
            CancellationToken cancellationToken = default)
        {
            // the base uri for api requests.
            string baseUri = this.Config.GetBaseUri();

            // prepare query string for API call.
            StringBuilder queryBuilder = new StringBuilder(baseUri);

            queryBuilder.Append("/v2/gift-cards/activities");

            // append request with appropriate headers and parameters
            var headers = new Dictionary <string, string>()
            {
                { "user-agent", this.UserAgent },
                { "accept", "application/json" },
                { "content-type", "application/json; charset=utf-8" },
                { "Square-Version", this.Config.SquareVersion },
            };

            // append body params.
            var bodyText = ApiHelper.JsonSerialize(body);

            // prepare the API call request to fetch the response.
            HttpRequest httpRequest = this.GetClientInstance().PostBody(queryBuilder.ToString(), headers, bodyText);

            if (this.HttpCallBack != null)
            {
                this.HttpCallBack.OnBeforeHttpRequestEventHandler(this.GetClientInstance(), httpRequest);
            }

            httpRequest = await this.AuthManagers["global"].ApplyAsync(httpRequest).ConfigureAwait(false);

            // invoke request and get response.
            HttpStringResponse response = await this.GetClientInstance().ExecuteAsStringAsync(httpRequest, cancellationToken).ConfigureAwait(false);

            HttpContext context = new HttpContext(httpRequest, response);

            if (this.HttpCallBack != null)
            {
                this.HttpCallBack.OnAfterHttpResponseEventHandler(this.GetClientInstance(), response);
            }

            // handle errors defined at the API level.
            this.ValidateResponse(response, context);

            var responseModel = ApiHelper.JsonDeserialize <Models.CreateGiftCardActivityResponse>(response.Body);

            responseModel.Context = context;
            return(responseModel);
        }