Ionic 4 Sidemenu routing issue

Ionic Framework ionic-v3
1

I have an issue with my sidemenu. I would like to have a default route that it goes to when pressing the back button on android. Can this be done. Right now when I click the back button it will route to the page that it was routed to previous to that instead on the page that I would like to be the root page. Or, if anyone knows how to exit the application that could work as well.

here are my sidemenu routes

const routes: Routes = [
  {
    path: '',
    loadChildren: './tabs/tabs.module#TabsPageModule'
  },
  {
    path: 'bible',
    loadChildren: './bible/bible.module#BiblePageModule'
  },
  {
    path: 'bible-search',
    loadChildren: './bible-search/bible-search.module#BibleSearchPageModule'
  },
  {
    path: 'bible-view/:chapter',
    loadChildren: './bible-view/bible-view.module#BibleViewPageModule'
  },
  {
    path: 'map',
    loadChildren: './map/map.module#MapPageModule'
  },
  {
    path: 'give',
    loadChildren: './give/give.module#GivePageModule'
  }
];

As you can see my default route is a tabs page, here is my tabs page routes.

const routes: Routes = [
  {
    path: 'tabs',
    component: TabsPage,
    children: [
      {
        path: 'messages',
        outlet: 'messages',
        component: MessagesPage
      },
      {
        path: 'message-details/:id',
        outlet: 'messages',
        component: MessageDetailsPage
      },
      {
        path: 'e3',
        outlet: 'e3',
        component: E3Page
      },
      {
        path: 'e3-view/:reading',
        outlet: 'e3',
        component: E3ViewPage
      },
      {
        path: 'prayers',
        outlet: 'prayers',
        component: PrayersPage
      },
      {
        path: 'request-prayer',
        outlet: 'prayers',
        component:RequestPrayerPage
      }
    ]
  },
  {
    path: '',
    redirectTo: '/tabs/(messages:messages)',
    pathMatch: 'full'
  }
];

I have the following code in my sidemenu pages to capture back button clicks but I am not sure how to correctly route this. I would like to route to my Messages Page which is a child of the Tabs Page.

this.platform.backButton.subscribe(() => {
      console.log('Back Pressed');
    });