Instances of subclasses of realm have the following slots which may be set:

name	A string identifying the realm for user interface purposes
users	An authentication provider (see Authentication providers). By default, the users-in-db provider is used.
checksum	An implementation of the checksum protocol used for verifying passwords (see Checksums). The sha-256 checksum is used by default.
secure	A boolean, that when set to a true value, forces the client to access the authentication realm via HTTPS. An attempt to access the realm via HTTP results in a redirect to the corresponding HTTPS URL. On by default.