public AuthConfig getAuthConfig() throws HyscaleException {
        if (defaultAuthConfig == null) {
            defaultAuthConfig = getAuthConfig(controllerConfig.getDefaultKubeConf());
        }
        return defaultAuthConfig;
    }
Gets {@link K8sConfigFileAuth} from {@link ControllerConfig} default config
@return {@link K8sConfigFileAuth}
workflow-controller/controller-service/src/main/java/io/hyscale/controller/builder/K8sAuthConfigBuilder.java