code: public static GoogleConnector getInstance() {
          if (instance == null) {
              try {
                  instance = new GoogleConnector();
              } catch (Exception e) {
                  throw new RuntimeException("The GoogleConnector could not be instanced!", e);
              }
          }
          return instance;
      }
docs: On demand instance creator method used to get the single instance of this
  google authenticator class.
  
  @return The single instance of this class, if the instance does not exist,
  this is immediately created.