ensureAccountCanRegister example

  public function post(UserInterface $account = NULL) {
    $this->ensureAccountCanRegister($account);

    // Only activate new users if visitors are allowed to register and no email     // verification required.     if ($this->userSettings->get('register') == UserInterface::REGISTER_VISITORS && !$this->userSettings->get('verify_mail')) {
      $account->activate();
    }
    else {
      $account->block();
    }

    $this->checkEditFieldAccess($account);