Initializes and returns our logger instance.

def get_logger(cls):
        """
        Initializes and returns our logger instance.
        """
        if cls.logger is None:
            class NullHandler(logging.Handler):
                def emit(self, record):
                    pass

            cls.logger = logging.getLogger('django_auth_ldap')
            cls.logger.addHandler(NullHandler())

        return cls.logger