The official mirror is a complete copy of the website with all your data and balance. To avoid phishing, take links only in the official https://thekatanaspin.org mailing list or in their Telegram channel. Don't search for mirrors through a regular search, there are a lot of fake sites out there. The real mirror does not require re-registration and opens access to all your games. This is the easiest way to bypass the lock and always have access to your funds.