auth_method = ChoiceAttribute('auth_method', choices=[
        'nickserv', 'authserv', 'sasl', 'server'])
    """The method to use to authenticate with the server.

    Can be ``nickserv``, ``authserv``, ``sasl``, or ``server``."""

    auth_method = 'nickserv'

    auth_password = ValidatedAttribute('auth_password')
    """The password to use to authenticate with the server."""

    auth_password = 'MYPASSHERE'

    auth_target = ValidatedAttribute('auth_target')
    """The user to use for nickserv authentication, or the SASL mechanism.

    May not apply, depending on ``auth_method``. Defaults to NickServ for
    nickserv auth, and PLAIN for SASL auth."""

    auth_username = ValidatedAttribute('auth_username')
    """The username/account to use to authenticate with the server.

    May not apply, depending on ``auth_method``."""