RequestHttpHeader.cs

[RequestHttpHeader("Idempotency-Key", isRequired: false)]
[RequestHttpHeader("Authorization", isRequired: true)]
[FunctionName("Api_AddItems")]
public async Task<IActionResult> Create(
    [HttpTrigger(AuthorizationLevel.Function, "post", "product")]
    [RequestBodyType(typeof(ProductCreateRequest), "product request")]HttpRequest request)
{
    return new OkObjectResult(new ProductModel());
}