AuthWorkflow.java

    public void signIn(User user) {
      api.signIn(user, onSuccessCallback: {
        getLinks(user);
      }, onErrorCallback(): {
        reauthorize(user);
      }
    
    public void getLinks(User user) {
      api.getLinks(user, onSuccessCallback: {
        postSuccessEvent();
      }, onErrorCallback: {
      if(user.hasName()) {
        bus.post(ERROR_EVENT);
      } else {
        postSuccessEvent();
      }
      });
    }
    
    private void reauthorize(User user) {
      api.reauthorize(user, onSuccessCallback: {
          signInUser(user);
      }, onErrorCallback: {
        bus.post(INVALID_CREDENTIALS_EVENT);
      }
    }
    
    private void postSuccessEvent() {
      if(isSignInFlow()) {
        bus.post(SIGN_IN_SUCCESS_EVENT);
      } else if(isRegisterFlow()) {
        bus.post(REGISTER_SUCCESS_EVENT);
      }
    }