VueJS String interpolation can access private attribute of TS object

Hi I recently start to learn vuejs by using typescript I made a model class using typescript and in it there are private attributes that need supposedly can only be accessed via getters and put it in vuex store

But in the string interpolation (moustache), somehow I can get the private attributes without getter

Please look at my code below, Thanks!

User.ts

import { Stock } from "./Stock";

export class User {
  private _funds: number;
  private _portofolio: Array<Stock>;

  constructor() {
    this._funds = 5000;
    this._portofolio = [];
  }
  public updateFunds(by: number): void {
    this._funds += by;
  }
  get portofolio(): Array<Stock> {
    return this._portofolio;
  }
}

store/index.ts (vuex load)

import Vue from "vue";
import Vuex from "vuex";
import { User } from "@/models/User";

Vue.use(Vuex);

export default new Vuex.Store({
  state: {
    user: new User()
  },
  getters: {
    currentUser: state => {
      return state.user;
    }
  },
  mutations: {},
  actions: {},
  modules: {}
});

App.vue (Master vue file)

<template>
  <div id="app">
        <p>Funds: {{ user._funds }}</p>
  </div>
</template>

<script lang="ts">
import Vue from "vue";

export default Vue.extend({
  data: function() {
    return {
      user: this.$store.getters.currentUser
    };
  },
  created: function() {
    console.log(this.user);
  }
});
</script>