Check and handle a config file.

        :param config_file: The path to the config file
        :type config_file: str

        :rtype: bool

def _handle_config(self, config_file):
        """
        Check and handle a config file.

        :param config_file: The path to the config file
        :type config_file: str

        :rtype: bool
        """
        config = self._get_config(config_file)

        self.resolver = DatabaseManager(
            config.get("databases", config.get("DATABASES", {}))
        )

        return True