title: Symfony FOS user bundle initiation
body: <p>I have a problem with installing FOS user bundle. I tried to search it everywhere, but probably I'm too dumb and can't find it.</p>
  
  <p>I've created an entity called Admin and tried to run doctrine:schema:update --force
  I've got an error: <code>The child node "from_email" at path "fos_user" must be configured.</code>   </p>
  
  <p>Here is my config.yml fos part.</p>
  
  <pre><code>fos_user:
      db_driver: orm # other valid values are 'mongodb' and 'couchdb'
      firewall_name: main
      user_class: AppBundle\Entity\Admin
  </code></pre>
  
  <p>any suggestions?</p>