// PUT /api/remidners/id
public void Update(ReminderItem item)
{
var response = Execute($"/api/reminders/{item.Id}", HttpMethod.Put, item.ToContent());
response.EnsureSuccessStatusCode();
}
// POST /api/remidners
public void Add(ReminderItem item)
{
var response = Execute("/api/reminders", HttpMethod.Post, item.ToContent());
response.EnsureSuccessStatusCode();
}