public static Task HandleExceptionAsync(HttpContext context, Exception e)
        {
            context.Response.ContentType = "application/json";
            if (e is RepositoryException)
            {
                context.Response.StatusCode = (int)HttpStatusCode.OK;

                return(context.Response.WriteAsync(ResponseModel.CreateError(e.Message).ToString()));
            }
            else
            {
                context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
                return(context.Response.WriteAsync("Internal Server Error."));
            }
        }