How to use the solnlib.conf_manager.ConfManager function in solnlib

def handleList(self, confInfo):
        logger.info("start list setup configure.")
        scheme, host, port = utils.extract_http_scheme_host_port(scc.getMgmtUri())
        conf_mgr = conf.ConfManager(self.getSessionKey(), self.appName, scheme=scheme, host=host, port=port)
        ta_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_conf)
        # read globala and proxy settings
        all_settings = ta_conf_file.get_all()
        if not all_settings:
            all_settings = {}
        self._setNoneValues(all_settings.get(setup_const.global_settings, {}))
        # read account credential settings
        for cred, cred_conf in self.cred_confs:
            cred_conf_file = get_or_create_conf_file(conf_mgr, cred_conf)
            creds = cred_conf_file.get_all()
            if creds:
                self._setNoneValues(creds)
                all_settings.update({cred: creds})
        # customized conf
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        settings = customized_conf_file.get_all()

def handleList(self, confInfo):
        logger.info("start list setup configure.")
        scheme, host, port = utils.extract_http_scheme_host_port(scc.getMgmtUri())
        conf_mgr = conf.ConfManager(self.getSessionKey(), self.appName, scheme=scheme, host=host, port=port)
        ta_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_conf)
        # read globala and proxy settings
        all_settings = ta_conf_file.get_all()
        if not all_settings:
            all_settings = {}
        self._setNoneValues(all_settings.get(setup_const.global_settings, {}))
        # read account credential settings
        for cred, cred_conf in self.cred_confs:
            cred_conf_file = get_or_create_conf_file(conf_mgr, cred_conf)
            creds = cred_conf_file.get_all()
            if creds:
                self._setNoneValues(creds)
                all_settings.update({cred: creds})
        # customized conf
        customized_conf_file = get_or_create_conf_file(conf_mgr, setup_const.myta_customized_conf)
        settings = customized_conf_file.get_all()

def _migrate(self):
        internal_endpoint = self.endpoint.internal_endpoint
        if not (internal_endpoint.endswith('settings') or
                internal_endpoint.endswith('account')):
            return

        splunkd_info = urlparse(get_splunkd_uri())
        self.base_app_name = util.get_base_app_name()
        self.conf_mgr = ConfManager(
            self.getSessionKey(),
            self.base_app_name,
            scheme=splunkd_info.scheme,
            host=splunkd_info.hostname,
            port=splunkd_info.port,
        )
        self.client = SplunkRestClient(
            self.getSessionKey(),
            self.base_app_name,
            scheme=splunkd_info.scheme,
            host=splunkd_info.hostname,
            port=splunkd_info.port,
        )
        self.legacy_passwords = None

        # migration legacy configuration in related conf files