在Azure中调用web api时，不记名令牌不起作用

我在使用Azure中的Web App从API应用程序调用工作时遇到问题 . 这是事物的结构 -

• Asp.Net Core 1.1 Web App protected by Azure AD authentication - 使用Kestrel在本地运行

Web应用程序的StartUp.cs具有以下用于将令牌获取到web api的代码

app.UseCookieAuthentication(); 
        app.UseOpenIdConnectAuthentication(new OpenIdConnectOptions
        {
            ClientId = ClientId, //Client Id of my current web app
            ClientSecret = ClientSecret, //ClientSecret of my current web app
            Authority = "https://login.microsoftonline.com/tenantguid",                CallbackPath = Configuration[Constants.ApplicationProxyCallbackPath],
            ResponseType = OpenIdConnectResponseType.CodeIdToken,
            Events = new OpenIdConnectEvents
            {
                OnAuthorizationCodeReceived = OnAuthorizationCodeReceived,
                OnRemoteFailure = OnAuthenticationFailed
            }
        });

对于OnAuthorizationCodeReceived方法，这是我的代码

private async Task OnAuthorizationCodeReceived(AuthorizationCodeReceivedContext context)
    {
        string userObjectId = (context.Ticket.Principal.FindFirst(Constants.ClaimsSchemaUri))?.Value;
        ClientCredential clientCred = new ClientCredential(ClientId, ClientSecret);
        AuthenticationContext authContext = new AuthenticationContext(Authority, new NaiveSessionCache(userObjectId, context.HttpContext.Session));
        AuthenticationResult authResult = await authContext.AcquireTokenByAuthorizationCodeAsync(
            context.ProtocolMessage.Code,
            new Uri(context.Properties.Items[OpenIdConnectDefaults.RedirectUriForCodePropertiesKey]),
            clientCred,
            WebAPIClientId);        
     }

使用上面的代码我可以成功获得持有者令牌 .

• Controller class where I make a call to WebApi

Task<string> results = null;
    string resultSet = String.Empty;
    AuthenticationResult authResult = null;

    string userObjectID = (currentUser.FindFirst("http://schemas.microsoft.com/identity/claims/objectidentifier"))?.Value;
    AuthenticationContext authContext = new AuthenticationContext(Startup.Authority, new NaiveSessionCache(userObjectID, current.Session));
    ClientCredential credential = new ClientCredential(Startup.ClientId, Startup.ClientSecret);
    authResult = await authContext.AcquireTokenSilentAsync(Startup.SearchAPIClientId, credential, new UserIdentifier(userObjectID, UserIdentifierType.UniqueId));

    //var callerIdentity = currentUser.Identity as WindowsIdentity;
    HttpClientHandler handler = null;

    //Setup async action
    Action action = () => {

        handler = new HttpClientHandler() { AllowAutoRedirect = true };

        //Setup for windows authentication
        var client = new HttpClient(handler);

        //Add common http headers
        client.DefaultRequestHeaders.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8");
        client.DefaultRequestHeaders.Add("Accept-Encoding", "gzip, deflate");
        client.DefaultRequestHeaders.Add("Accept-Language", "en-US,en;q=0.8");
        client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36");
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authResult.AccessToken);

        results = client.GetStringAsync("https://myapi.azurewebsites.net/api/search/");
    };

    action.Invoke();

    resultSet = await results as string;

对API的调用被重定向到login.microsftonline.com，这意味着我的令牌未被理解 .

• The Web API is protected with Azure Authentication using the OpenIdConnect package in code, just like Web App code above .

我看了几个相关的帖子，但没有什么工作正常 .

Update 1 - Updated Web API to use JWTBearer Authentication 现在，我在Web App中获取的承载令牌能够成功验证我的Web API .

我的Web API应该调用另一个也受Azure AD身份验证保护的自定义API . 我希望获得相同的令牌，但为了启动我在使用获取令牌进行额外的自定义API时遇到问题 . 它正在抛出没有消息的内部服务器500 . 有什么想法吗？

Update 2 - Detailed Error 在尝试获取第三个api的令牌时，我遇到以下异常 - "AADSTS50105: Application 'source client id guid' is not assigned to a role for the application 'target client id guid'."