Upon successful login, the Security system checks whether a better algorithm

is available to hash the user's password. If it is, it'll hash the correct

password using the new hash. If you use a Guard authenticator, you first need to

`provide the original password to the Security system<Provide the Password when usingGuards>`_.

`provide the original password to the Security system<Provide the Password when usingGuard>`_.

You can enable the upgrade behavior by implementing how this newly hashed

password should be stored: