initializeObs method 
    
    
    
  Implementation
  Future<void> initializeObs() async {
  final config = <String, dynamic>{};
  if (globalResults?['uri'] == null) {
    final configFile = File('${ObsUtil.userHome}/.obs/credentials.json');
    if (!configFile.existsSync()) {
      throw UsageException('OBS connection information not provided.', usage);
    }
    config.addAll(json.decode(configFile.readAsStringSync()));
  } else {
    config['uri'] = globalResults!['uri'];
    if (globalResults?['passwd'] != null) {
      config['password'] = globalResults!['passwd'];
    }
  }
  _obs = await ObsWebSocket.connect(
    config['uri']!,
    password: config['password'],
    timeout: Duration(
      seconds: globalResults?['timeout'] == null
          ? 5
          : int.parse(globalResults!['timeout']),
    ),
    logOptions: ObsUtil.convertToLogOptions(globalResults!['log-level']),
  );
}