Newscoop\Entity\User::getUsername PHP Method

    public function getUsername()
    {
        return (string) $this->username;
    }

 public function setDefaultsFromEntity(User $user)
 {
     $defaults = array('first_name' => $user->getFirstName(), 'last_name' => $user->getLastName(), 'username' => $user->getUsername(), 'attributes' => array());
     $profile = $this->getSubForm('attributes');
     foreach ($profile as $field) {
         $defaults['attributes'][$field->getName()] = (string) $user->getAttribute($field->getName());
     }
     $this->setDefaults($defaults);
 }