如果TokenReceived事件没有被触发，有没有办法在Unity中获得Firebase Cloud Messaging Token？

using Firebase;
using Firebase.Messaging;
using UnityEngine;

public class TokenManager : MonoBehaviour
{
    void Start()
    {
        FirebaseApp.CheckAndFixDependenciesAsync().ContinueWith(task =>
        {
            var dependencyStatus = task.Result;
            if (dependencyStatus == DependencyStatus.Available)
            {
                FirebaseMessaging.TokenReceived += OnTokenReceived;
                FirebaseMessaging.RequestPermissionAsync().ContinueWith(requestTask =>
                {
                    FirebaseMessaging.TokenRegistrationOnInitEnabled = false;
                    FirebaseMessaging.SubscribeAsync("<topic>");
                });
            }
            else
            {
                Debug.LogError($"Failed to resolve Firebase dependencies: {dependencyStatus}");
            }
        });
    }

    void OnTokenReceived(object sender, TokenReceivedEventArgs token)
    {
        Debug.Log($"Received Token: {token.Token}");
    }
}