public async Task Put(int id, Todo todo)
		{
			var oldTodo = await Get(id);
			oldTodo.Task = todo.Task;
			oldTodo.IsCompleted = todo.IsCompleted;

			await _ctx.SaveChangesAsync();
		}
		public async Task<HttpResponseMessage> Post(Todo todo)
		{
			_ctx.Todos.Add(todo);
			await _ctx.SaveChangesAsync();
			return Request.CreateResponse(HttpStatusCode.Created);
		}