Install SQlite for Ionic4 Vue

I'm trying to add SQlite to my ionic4 project, but get installation errors.

My NPM install was this:

    ionic cordova plugin add cordova-sqlite-storage
    npm install @ionic-native/sqlite

    //ionic plugin add cordova-sqlite-storage ==> this one makes error

In main.js, I tried each of the following:

    import SQLite from 'ionic-native';
    import {SQLite} from 'ionic-native';
    import SQLite from '@ionic-native/sqlite';
    import {SQLite} from '@ionic-native/sqlite';
    import { SQLite, SQLiteObject } from '@ionic-native/sqlite';

Here are the errors: a) npm warning, b) console error, and c) Chrome inspector for main.js

And here's the code from main.js (last line is where everything fails).

    new Vue({
      el: '#app',
      router,
      template: '<App/>',
      components: { App },
      render : (h) => h(App),
      mounted() {

        this.storage = new SQLite();

from Install SQlite for Ionic4 Vue