data: {
    app_images:[
      { app: '../assets/img/logos/logo.png' }
    ],
    json_repository:[],
    user: {
      username: null,
      password: null
    },
    submitted: null
  }

methods: {
  doLogin: function() {
    this.submitted = this.user;
},

methods: {
  doLogin: function() {
    this.submitted = Object.assign({}, this.user);
},