.NET Core Application - IHttpClientFactory and Add Http Client middleeware

Startup.cs

// Startup.cs
public class Startup
{
    // Some code...
    
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddHttpClient("github", c =>
        {
            c.BaseAddress = new Uri("https://api.github.com/");
            // Github API versioning
            c.DefaultRequestHeaders.Add("Accept", "application/vnd.github.v3+json");
            // Github requires a user-agent
            c.DefaultRequestHeaders.Add("User-Agent", "theCodeBlogger.com Demo");
        });

        services.AddControllersWithViews();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        // Request process pipeline...
    }
}

// HomeController.cs
public class HomeController : Controller
{
    private readonly ILogger<HomeController> _logger;
    private readonly IHttpClientFactory _clientFactory;

    public HomeController(ILogger<HomeController> logger, IHttpClientFactory clientFactory)
    {
        _logger = logger;
        _clientFactory = clientFactory;
    }

    public async Task<IActionResult> Index()
    {
        // URL not specifying base address and no request headers
        var request = new HttpRequestMessage(HttpMethod.Get,
        "/repos/dotnet/AspNetCore.Docs/branches");

        // Create HttpClient by providing name
        // Use same name which is used while configuring CreateClient
        var client = _clientFactory.CreateClient("github");

        var response = await client.SendAsync(request);

        if (response.IsSuccessStatusCode)
        {
            using var responseStream = await response.Content.ReadAsStreamAsync();
            dynamic branches = await JsonSerializer.DeserializeAsync
                <IEnumerable<dynamic>>(responseStream);
        }
        else
        {
            // Error Handling
        }
        return View();
    }
}