Home controller for web app calling web API scenario

HomeController.cs

public class HomeController : Controller
{
    private readonly ILogger<HomeController> _logger;
    private readonly ITokenAcquisition _tokenAcquisition;

    public HomeController(ILogger<HomeController> logger, ITokenAcquisition tokenAcquisition)
    {
        _logger = logger;
        _tokenAcquisition = tokenAcquisition;
    }

    public async Task<IActionResult> Index()
    {
        //// Acquire the access token.
        string[] scopes = new string[] { "api://5e971e5c-a661-4d82-ba97-935480492129/access_as_user" };
        string accessToken = await _tokenAcquisition.GetAccessTokenForUserAsync(scopes);

        // Use the access token to call a protected web API.
        HttpClient client = new HttpClient();
        string url = "https://localhost:44389/weatherforecast";

        // Set Bearer Token
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);

        // Call API
        string json = await client.GetStringAsync(url);
        var apiOutput = JsonConvert.DeserializeObject<List<WeatherForecast>>(json);

        // Send Data To View
        return View(apiOutput);
    }

    public IActionResult Privacy()
    {
        return View();
    }

    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
    public IActionResult Error()
    {
        return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
    }
}