How to use the react-native-router-flux.Actions.app function in react-native-router-flux

this._service.onLogin((/* err, */ /* res */) => {
      // console.log('onLogink', err, res, this._service.service.loggedInUser);
      if (this._mounted && this._service.service.loggedInUser) {
        if (this._service.service.loggedInUser.username) {
          Actions.app({ type: 'reset' });
        }
      }
    });
    this._mounted = true;

}, () => {
          // console.log('RegCB 01', lerr, lres);
          if (this._net.service.loggedInUser && this._net.service.loggedInUser.username) {
            Actions.app({ type: 'reset' });
          } else {
            this.setState({ setUsername: true, alert: { success: '' } });
            this._net.service.getUsernameSuggestion((Uerr, Ures) => {
              if (Uerr) {
                this.setState({ alert: { error: 'Error fetching username!' } });
              } else if (Ures) {
                this.setState({ inputUsername: Ures });
              }
            });
          }
        });
      });

        .then(() => Actions.app({ type: 'reset' }))
        // Not Logged in, show Login screen

this._service.onLogin(() => {
      if (this._mounted && this._service.service.loggedInUser) {
//        this._service.switchToLoggedInUser();
        Actions.app({ type: 'reset' });
      }
    });
    // Get server name

.then((token) => {
                Actions.app({type: 'reset'});
                // connect to websocket
                Actions.app({type: 'CONNECT', token});
            })
            // Not Logged in, show Login screen

setTimeout(() => {
                  Actions.app({ type: 'reset' });
                }, 1000);
              });

setTimeout(() => {
                        Actions.app({type: 'reset'});
                    }, 2300);
                });

          onPress: () => { this.props.closeSideMenu(); Actions.app(); },
        },

.then(() => {
                    Actions.app({ type: 'reset' });
                    Actions.pop();
                  }).catch(err => this.setState({ resultMsg: { error: err.message } }));
              }

setTimeout(() => {
              Actions.app({ type: 'reset' });
            }, 1000);
          });