ionViewCanEnter() doesn't work

[robinyo]

Try:

ionViewCanEnter() {

    if (! this.authService.authenticated) {
        setTimeout(() => this.navCtrl.setRoot('login'))
    }

    return this.authService.authenticated;
 }

See:

• https://github.com/ionic-team/ionic/issues/12193#issuecomment-363177872
• NavGuards with ionic-angular 3.5.0 has a breaking change