Base64 string convert to ogg file, play as AudioClip in Unity

AudioPlayer.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;

namespace DefaultNamespace.Scripts
{
    public static class AudioPlayer
    {
        static async Task<AudioClip> GetAudioClip(string b64Str)
        {
            var fileBytes = Convert.FromBase64String(b64Str);
            var fullPath = Application.persistentDataPath + "/temp.ogg";
            await File.WriteAllBytesAsync(fullPath, fileBytes);
            fullPath = "file://" + fullPath;
            using (var uwr = UnityWebRequestMultimedia.GetAudioClip(fullPath, AudioType.MPEG))
            {
                uwr.downloadHandler = new DownloadHandlerAudioClip(fullPath, AudioType.OGGVORBIS);
                ((DownloadHandlerAudioClip)uwr.downloadHandler).streamAudio = true;

                uwr.SendWebRequest();
                while (!uwr.isDone)
                    await Task.Delay(1); //can replace with UniTask.WaitUntil(() => uwr.isDone);
                File.Delete(fullPath);
                return (uwr.downloadHandler as DownloadHandlerAudioClip)?.audioClip;
            }
        }



        private static Dictionary<string, AudioClip> _audioClips = new Dictionary<string, AudioClip>();

        public static async void PlayOgg(string audioName, string base64)
        {
            if (_audioClips.TryGetValue(audioName, out var clip))
            {
                AudioSource.PlayClipAtPoint(clip, Vector3.zero);
                return;
            }

            var audioClip = await GetAudioClip(base64);
            _audioClips.Add(audioName, audioClip);

            AudioSource.PlayClipAtPoint(audioClip, Vector3.zero);
        }
    }
}