/// <summary>
        /// Creates a <see cref="ShopifyRecurringCharge"/>. 
        /// </summary>
        /// <param name="charge">The <see cref="ShopifyRecurringCharge"/> to create.</param>
        /// <returns>The new <see cref="ShopifyRecurringCharge"/>.</returns>
        public async Task<ShopifyRecurringCharge> CreateAsync(ShopifyRecurringCharge charge)
        {
            IRestRequest req = RequestEngine.CreateRequest("recurring_application_charges.json", Method.POST, "recurring_application_charge");

            req.AddJsonBody(new { recurring_application_charge = charge });

            return await RequestEngine.ExecuteRequestAsync<ShopifyRecurringCharge>(_RestClient, req);
        }
        /// <summary>
        /// Creates a <see cref="ShopifyRecurringCharge"/>.
        /// </summary>
        /// <param name="charge">The <see cref="ShopifyRecurringCharge"/> to create.</param>
        /// <returns>The new <see cref="ShopifyRecurringCharge"/>.</returns>
        public async Task <ShopifyRecurringCharge> CreateAsync(ShopifyRecurringCharge charge)
        {
            IRestRequest req = RequestEngine.CreateRequest("recurring_application_charges.json", Method.POST, "recurring_application_charge");

            req.AddJsonBody(new { recurring_application_charge = charge });

            return(await RequestEngine.ExecuteRequestAsync <ShopifyRecurringCharge>(_RestClient, req));
        }