Entity Files, Load User Profile Picture

Hello, I am developing a project in unity and photon and playfab are integrated into my project. In the login (registration phase), I make users choose 1 profile photo and upload it to the playfab entity files. Since I want users to be able to see the picture of other users in the room when they set up a room, I am trying to download the profile photo selected by the user at login from the playfab entity file. I have a prefab showing the users in the room and the code file is in this prefab

public class playerprafab : MonoBehaviourPunCallbacks
{
 

    [SerializeField]
    private Text _text;
    [SerializeField]
    private Image profilep2;
    public bool Ready = false;
    public Player Player { get; private set; }


    public int GlobalFileLock = 0;
    private string entityId; // Id representing the logged in player
      private string entityType; // entityType representing the logged in player
    private readonly Dictionary<string, string> _entityFileJson = new Dictionary<string, string>();






    public void SetPlayerInfo(Player player)
    {
        Player = player;
        _text.text = player.NickName;
 
        
    }


    void OnSharedFailure(PlayFabError error)
    {
        Debug.LogError(error.GenerateErrorReport());
        GlobalFileLock -= 1;
    }


    void OnLogin(LoginResult result)
    {


        entityId = result.EntityToken.Entity.Id;
        // The expected entity type is title_player_account.
        entityType = result.EntityToken.Entity.Type;
        Debug.Log(entityType + entityId);
    }


    public void LoadAllFiles()
    {
        if (GlobalFileLock != 0)
            throw new Exception("This example overly restricts file operations for safety. Careful consideration must be made when doing multiple file operations in parallel to avoid conflict.");


        GlobalFileLock += 1; // Start GetFiles
        var request = new PlayFab.DataModels.GetFilesRequest { Entity = new PlayFab.DataModels.EntityKey { Id = entityId, Type = entityType } };
        PlayFabDataAPI.GetFiles(request, OnGetFileMeta, OnSharedFailure);
    }




 
        void Start()
    {

   

        PlayFabAuthenticationAPI.GetEntityToken(new GetEntityTokenRequest(),
	(entityResult) =>
	{
	var entityId = entityResult.Entity.Id;
	var entityType = entityResult.Entity.Type;
	}, OnPlayFabError);
   	
     LoadAllFiles();
 }




    void OnGetFileMeta(PlayFab.DataModels.GetFilesResponse result)
    {
        Debug.Log("Loading " + result.Metadata.Count + " files");


        _entityFileJson.Clear();
        foreach (var eachFilePair in result.Metadata)
        {
            _entityFileJson.Add(eachFilePair.Key, null);
            GetActualFile(eachFilePair.Value);
        }
        GlobalFileLock -= 1; // Finish GetFiles
    }


    void GetActualFile(PlayFab.DataModels.GetFileMetadata fileData)
    {
        GlobalFileLock += 1; // Start Each SimpleGetCall
        PlayFabHttp.SimpleGetCall(fileData.DownloadUrl,
            result => { _entityFileJson[fileData.FileName] = Encoding.UTF8.GetString(result); GlobalFileLock -= 1; }, // Finish Each SimpleGetCall
            error => { Debug.Log(error); }
        );
    }


    void OnPlayFabError(PlayFabError error)
    {
        Debug.Log(error.GenerateErrorReport());
    }

}

Result : I can't access Entity Key .

/File/GetFiles: Invalid input parameters EntityKey: Type or TypeString is required. EntityKey: Id is required. EntityKey: is not an allowed value of Type.

This prefab is loaded after login, when the user joins or sets up the room. I'm already logged in, why can't I access the entity key.

Question I want to ask: - How can I call OnLogin() inside Start()? - I have an image named profilep2. I want the image that I will download from entity files to be synchronized to profilep2, how and where can I do this in the code file