/// <summary>
/// This is the first API call required to cancel an order.
/// Only orders with makes and with an available_amount of more than 0 can be cancelled.
/// </summary>
/// <param name="apiParams"></param>
/// <returns></returns>
public async Task <CreateResponse> CreateCancellation(string apiParams)
{
var httpContent = new StringContent(apiParams, Encoding.UTF8, "application/json");
var result = await ExecuteCall(cancellationRequest, httpContent);
return(CreateResponse.FromJson(result));
}