title: Symfony - authenticated anonymous user account -> convert to regular one
body: <p>I am using FossUserBundle. Can I set it to described behavior (down below) or get some additional bundle?</p>
  
  <p>If user is not authenticated he/she has anonymous account stored in DB. By registering he/she can convert it to regular account.</p>
  
  <p>The packege exists for Django it is called lazy signup: <a href="https://github.com/danfairs/django-lazysignup" rel="nofollow">https://github.com/danfairs/django-lazysignup</a></p>