FOS\UserBundle\Model\User::setPlainPassword PHP Method

    public function setPlainPassword($password)
    {
        $this->plainPassword = $password;
    }

 /**
  * Set user data using shibboleth heders as data source
  *
  * @param \FOS\UserBundle\Entity\User                             $user
  * @param \KULeuven\ShibbolethBundle\Security\ShibbolethUserToken $token
  */
 private function setUserData(BaseUser $user, ShibbolethUserToken $token)
 {
     if ($user instanceof User) {
         $user->setGivenName($token->getGivenName());
         $user->setSurname($token->getSurname());
     }
     $user->setPlainPassword('no_passwd');
     if (null != $token->getMail()) {
         $user->setEmail($token->getMail());
     } else {
         $user->setEmail($token->getUsername() . '@kuleuven.be');
     }
     if ($token->isStudent()) {
         $user->addRole('ROLE_STUDENT');
     } elseif ($token->isStaff()) {
         $user->addRole('ROLE_STAFF');
     } else {
         $user->addRole('ROLE_GUEST');
     }
     $user->addRole('ROLE_USER');
     $user->setEnabled(true);
     $this->userManager->updateUser($user);
 }