How is this script working?
After registering a player, a ,,players" folder is created, in which a YML file is created, which is named same as the player's nickname. This file stores the "Password" value with the player's password. However, it is not just a password. Before saving it to the file, the string "xyz01" is added to it, and then the password with the additional string is hashed using the SHA-256 method . Hash is an irreversible function, which means that there is no option to steal the password or accidentally clear it. The only thing that can clear the password is deleting the password file. When logging in, "xyz01" is added to the argument entered by the player. Then it is hashed. script checks whether the encrypted value provided by the player is the same as the one saved in his file. if no, the password is incorrect. if yes, password is correct. When changing the password, the password file is overwritten with the new password, and when unregistering, the file is deleted, forcing you to register again. /hashedpassword is checking YML file and displays it to the sender.