我有一个测试在我的身边，我遇到了你的问题，以及在我的身边，这是我用来生成令牌手动调用API。使用代码我的评论。

@page "/profile"
@using Microsoft.AspNetCore.Authorization
@using Microsoft.AspNetCore.Components.WebAssembly.Authentication;
@attribute [Authorize]
@inject IAccessTokenProvider TokenProvider
@inject HttpClient Http

<h3>User Profile</h3>
<button @onclick="call">
    call api
</button>
<div>@result</div>

@code {

    private string result = "no data now";

    private async Task call()
    {
        try
        {
            result = await Http.GetStringAsync("https://localhost:7018/WeatherForecast");
        }
        catch (AccessTokenNotAvailableException exception)
        {
            exception.Redirect();
        }

        //var http = new HttpClient();
        //http.BaseAddress = new Uri("https://localhost:7018/WeatherForecast");

        //var tokenResult = await TokenProvider.RequestAccessToken(
        //    new AccessTokenRequestOptions
        //        {
        //            Scopes = new[] { "api://xxxx/Tiny.Read" }
        //        });

        //if (tokenResult.TryGetToken(out var token))
        //{
        //    http.DefaultRequestHeaders.Add("Authorization",
        //        $"Bearer {token.Value}");
        //    result = await http.GetStringAsync("https://localhost:7018/WeatherForecast");
        //}
    }
}