I am using basic authorization to consume third party API from my WASM project. However in developer tools I see HTTP 403 error. I am using my usual way of authenticating and in postman these credentials work. Is basic auth possible in WASM ? My example code technique is here:

@page "/"
@inject HttpClient TestClient
<h3>Presentations Scheduled</h3>

<form>
   <fieldset class="form-group">
       <div>
           <button type="button" class="btn btn-dark mr-sm-2 mb-2"
                   @onclick=@(async ()=>  await GetToday())>
               Today
           </button>
       </div>
   </fieldset>

   @if (string.IsNullOrWhiteSpace(errorString) == false)
   {
       <div class="h2">@errorString</div>
   }
   else
   {
      <div class="h2">@httpResponse</div>
   {
</form>

@code
{
    string errorString;
    string httpResponse;

   private async Task GetToday()
   {
        var byteArray = Encoding.ASCII.GetBytes("user:pass");                
        TestClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",Convert.ToBase64String(byteArray));
        string todayDate = DateTime.Today.AddDays(0).ToString("yyyyMMdd");
        string TestbaseURL = "https://webservices.XXXAPI.com/";
        UriBuilder TestURI = new UriBuilder(TestbaseURL);
        TestURI.Scheme = "https";
        TestURI.Path = "ws/run/reservations.json";
        TestURI.Query = "resource_query_id=244782";
        var Testquery = HttpUtility.ParseQueryString(TestURI.Query);
        Testquery["scope"] = "extended";
        Testquery["start_dt"] = todayDate;
        Testquery["end_dt"] = todayDate;
        TestURI.Query = Testquery.ToString();
        TestbaseURL = TestURI.ToString();

       try
       {
            httpResponse = await TestClient.GetStringAsync(TestbaseURL);
            errorString = null;
       }
       catch (Exception ex)
       {
           errorString = $"There was a problem: {ex.Message}";
       }