How to use the gitlabform.configuration.core.KeyNotFoundException function in gitlabform

self.session.mount('http://', HTTPAdapter(max_retries=retries))
        self.session.mount('https://', HTTPAdapter(max_retries=retries))
        self.session.verify = self.ssl_verify

        try:
            version = self._make_requests_to_api("version")
            logging.info("Connected to GitLab version: %s (%s)" % (version['version'], version['revision']))
        except Exception as e:
            raise TestRequestFailedException(e)
        try:
            api_version = configuration.get("gitlab|api_version")
            if api_version != 4:
                raise ApiVersionIncorrectException(e)
            logging.info("Config file is declared to be compatible with GitLab API v4")
        except KeyNotFoundException:
            logging.fatal("Aborting. GitLabForm 1.0.0 has switched from GitLab API v3 to v4 in which some parameter "
                          "names have changed. By its design GitLabForm reads some parameter names directly from "
                          "config.yml so you need to update those names by yourself. See changes in config.yml "
                          "in this diff to see what had to be changed there: "
                          "https://github.com/egnyte/gitlabform/pull/28/files . "
                          "After updating your config.yml please add 'api_version' key to 'gitlab' section and set it "
                          "to 4 to indicate that your config is v4-compatible.")
            sys.exit(3)

To get the dict under it use: get("group_settings|sddc|deploy_keys")

        :return: element from YAML file (dict, array, string...)
        """
        tokens = path.split('|')
        current = self.config_from_file

        try:
            for token in tokens:
                current = current[token]
        except:
            if default is not None:
                return default
            else:
                raise KeyNotFoundException

        return current

def get_project_config(self, group_and_project) -> dict:
        """
        :param group_and_project: 'group/project'
        :return: literal configuration for this project or empty dict if not defined
        """
        try:
            return self.get("project_settings|%s" % group_and_project)
        except KeyNotFoundException:
            return {}