public function changeBckImage(UserFile $image, User $user)
 {
     $webpath = '/files/resources/desktop-images/' . $user->getUsername() . '/';
     $apppath = __DIR__ . '/../../../../web';
     $fs = new Filesystem();
     if ($this->getBackgroundImage() !== ServerConstants::DEFAULT_BACKGROUND_IMAGE) {
         $fs->remove($apppath . $this->getBackgroundImage());
     }
     $fs->copy($apppath . $image->getWebPath(), $apppath . $webpath . $image->getName());
     $this->setBackgroundImage($webpath . $image->getName());
     return $this;
 }