- Rename HashResult to EncryptedPassword to reflect its broader use
- Use EncryptedPassword in methods that require the hash and the salt, instead of passing them as strings separately
- Store EncryptedPassword as field in PlayerAuth; updatePassword() thus processes the entire data in the EncryptedPassword object
- Rename getHash() to computeHash(): get.. suggests it's just retrieving some field but it's really doing a computation, which is quite complex depending on the hash algorithm
