public async void OnDelete(object sender, EventArgs e)
        {
            JobOrder jobOrder = _orders[0];
            await _client.DeleteAsync(Url + jobOrder.Id);

            _orders.Remove(jobOrder);
        }
        public async void OnUpdate(object sender, EventArgs e)
        {
            JobOrder jobOrder = _orders[0];

            jobOrder.ServiceOrder += "[updated]";
            string content = JsonConvert.SerializeObject(jobOrder);
            await _client.PutAsync(Url + jobOrder.Id, new StringContent(content, Encoding.UTF8, "application/json"));
        }
        public async void OnAdd(object sender, EventArgs e)
        {
            JobOrder jobOrder = new JobOrder {
                ServiceOrder = $"Timestamp {DateTime.UtcNow.Ticks}"
            };
            string content = JsonConvert.SerializeObject(jobOrder);
            await _client.PostAsync(Url, new StringContent(content, Encoding.UTF8, "application/json"));

            _orders.Insert(0, jobOrder);
        }