title: Vagrant box: can't login with password from VirtualBox GUI
body: <p>I am learning to use Vagrant, and I tried to boot a Vagrant machine (an ubuntu/trusty64 built in the recommended way "vagrant init ubuntu/trusty64; vagrant up") from inside the VirtualBox GUI (double clicking the icon of the Vagrant machine). But I cannot login: no username, no password.</p>
  
  <p>Do I need to add a specific provision, or there is another easier way to do this?</p>
  
  <p>Thank you.</p>