void Start()
    {
        string playerName = PlayerPrefs.GetString(PLAYER_PERSISTENT_NAME_KEY);

        OnConnected_Callback = () => { PhotonNetwork.playerName = playerName; };

        if (m_PlayerNameField)
        {
            m_PlayerNameField.text = playerName;
        }
    }
 public void SetPlayerName(string playerName)
 {
     if (m_IsConnected)
     {
         PhotonNetwork.playerName = playerName;
     }
     else
     {
         OnConnected_Callback = () => { PhotonNetwork.playerName = playerName; };
     }
     PlayerPrefs.SetString(PLAYER_PERSISTENT_NAME_KEY, playerName);
 }