private string BuildUrl(string uri, object uriParams)
{
if (uri.Contains("?"))
{
throw new NotSupportedException("Custom url paramters not supported yet.");
}
uri = this.Endpoint.TrimEnd('/') + "/" + uri.Trim('/');
var parameters = UriHelpers.GetQueryString(uriParams);
return(string.IsNullOrWhiteSpace(parameters) ? uri : $"{uri}?{parameters}");
}