close method
Closes the current instance of onboarding_service
Implementation
@override
Future<void> close() async {
if (_atLookUp != null) {
await (_atLookUp as AtLookupImpl).close();
}
_atLookUp = null;
atClient = null;
logger.info('Closing current instance of at_onboarding_cli (exit code: 0)');
exit(0);
}