how to handle token timeout and redirect to login page?

[TonyLuo]

Ionic version: (check one with "x")
[x ] 3.x

I'm submitting a ... (check one with "x")

[x ] support request => Please do not submit support requests here, use one of these channels: https://forum.ionicframework.com/ or http://ionicworldwide.herokuapp.com/

Current behavior:

Expected behavior:

Steps to reproduce:

I would like to handle the token timeout issue, and redirect to the login page, but this.navCtrl.push(LoginPage) doesn't work for me
Related code:

private listenToAuthorizationEvents() {
    this.events.subscribe('user:unauthorized', () => {
     this.redirectToLoginPage();
    });
  }

  private redirectToLoginPage() {
    this.navCtrl.push(LoginPage);

  }

Other information:

Ionic info: (run ionic info from a terminal/cmd prompt and paste output below):

insert the output from ionic info here

[daveshirman]

This should be on StackOverflow as a question, not as a support request.

[jgw96]

Hello! Thanks for opening an issue with us! As this seems like more of a support question I will urge that you ask this question on our forum or on our slack channel. Thanks for using Ionic!

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.