public void LoadBuffSaveData(UserBase user)
{
DateTime loadedStartTime = DateTime.MinValue;
bool loadedLastTimeSuccessful = DateTime.TryParse(PlayerPrefs.GetString(SystemInfo.deviceUniqueIdentifier + "_Buff_itemID_" + itemID + " _StartTime_"), out loadedStartTime);
if (loadedLastTimeSuccessful == true) //we successfully loaded buff
user.UseBuffAtCustomTime(this, loadedStartTime);
}