Vue

HTML

<div id="app">
  <h2>Cpf:</h2>
  <span>{{this.user.cpf}}</span>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

new Vue({
  el: "#app",
  data: {
    user: {
     authenticated: false,
     email: '',
     id: '',
     cpf: ''
		},
    
  },
  mounted () {
  	var user = {}
  	user.cpf = '10214945691'
    user.email = '[email protected]'
    user.id = '1'
    localStorage.setItem('userData', user);
    
    this.user = localStorage.getItem('userData');
    console.log(this.user);
    
  }
})