public async Task <IActionResult> RunAsync(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req, ILogger log)
{
log.LogInformation("C# HTTP trigger function processed a request.");
var todoString = await new StreamReader(req.Body).ReadToEndAsync().ConfigureAwait(false);
var todo = JsonSerializer.Deserialize <Todo>(todoString);
var id = await todoManager.AddTodoAsync(todo).ConfigureAwait(false);
return(new CreatedResult(string.Empty, id));
}