Umbraco dotnet core API controller with annotations

BlogController.cs

using Microsoft.AspNetCore.Mvc;
using System.Collections.Generic;
using Umbraco.Cms.Core;
using Umbraco.Cms.Web.Common.Controllers;
using Umbraco.Extensions;
using Umbracov9AlphaAPIs.APIModels;

namespace Umbracov9AlphaAPIs.Controllers
{
    [ApiController]
    [Route("umbraco/api/[controller]")]
    public class BlogController : UmbracoApiController
    {
        private readonly IPublishedContentQuery _contentQuery;
        public BlogController(IPublishedContentQuery contentQuery)
        {
            _contentQuery = contentQuery;
        }
        [HttpGet]
        public List<BlogPostModel> GetBlogPosts()
        {
            List<BlogPostModel> topics = new();
            var blogs = _contentQuery.ContentSingleAtXPath("//home/blogRepo").Children;

            foreach (var blog in blogs)
            {
                topics.Add(new()
                {
                    Title = blog.GetProperty("blogTitle").GetValue().ToString(),
                    Preview = blog.GetProperty("blogPreview").GetValue().ToString(),
                    Url = blog.Url(),
                    PublishedDate = blog.CreateDate
                });
            }
            return topics;
        }
    }
}