title: TypeError: Cannot read property '_wrapper' of undefined vueJS
body: <p>I have a bit trouble with my VueJS app. What I want is to send request to server on load, that responses me &quot;username&quot; of my user and update it on my website. Everything works fine, but when I try to assigned retured value, my program stops loading images and error from title appears in console. Value from server is correct - checked by console.
  Here is my code for displaying username :</p>
  <pre><code>&lt;span class=&quot;iconsNav&quot; style=&quot;margin-left: 4px&quot; &gt;{{this.username}}&lt;/span&gt;
  </code></pre>
  <p>And here is my script:</p>
  <pre><code>&lt;script&gt;
  //components
  export default {
    methods : {
      login(){
        //function to login
      },
      async getUserData(){
        var token = 'Token '+ VueCookie.get('access_token')
        const response = await axios.get('http://localhost:8000/api/account/data',{
          headers:{
            'Authorization': token
          }
          })
  
          console.log(response.data.username)
          //when i try execute this line error occurs
          this.username = response.data.username
      }
    },
    data(){
      return {
        username : &quot;User&quot;
      }
  },
  mounted: function(){
    this.getUserData()
  }
  }
  &lt;/script&gt;
  </code></pre>