Microsoft Graph API访问令牌验证失败(java)

import com.microsoft.aad.msal4j.*;

public class GraphApiExample {
    private static String clientId = "Your_Client_Id";
    private static String clientSecret = "Your_Client_Secret";
    private static String authority = "https://login.microsoftonline.com/Your_Tenant_Id";

    public static void main(String[] args) {
        IConfidentialClientApplication app;
        try {
            app = ConfidentialClientApplication.builder(clientId, ClientCredentialFactory.createFromSecret(clientSecret))
                    .authority(authority)
                    .build();

            ClientCredentialParameters parameters = ClientCredentialParameters.builder(
                    Collections.singleton("https://graph.microsoft.com/.default"))
                    .build();

            CompletableFuture<IAuthenticationResult> future = app.acquireToken(parameters);
            IAuthenticationResult result = future.get();

            String accessToken = result.accessToken();
            System.out.println("Access Token: " + accessToken);

            // 使用访问令牌调用Microsoft Graph API
            // ...

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}