Issue #3196456 by al_trottier: RuntimeException in LoginCallbackController

use Drupal\Core\Controller\ControllerBase;

use Drupal\Core\Entity\EntityTypeManagerInterface;

use Drupal\Core\Routing\TrustedRedirectResponse;

use Drupal\externalauth\ExternalAuth;

use Drupal\o365\AuthenticationService;

use Drupal\o365\GraphService;

use Drupal\o365\O365ConnectorInterface;

use Drupal\user\UserInterface;

use Symfony\Component\DependencyInjection\ContainerInterface;

use Drupal\o365\GraphService;

use Symfony\Component\HttpFoundation\RedirectResponse;

/**

 * The UserLoginController class.

   * @param \Drupal\o365\O365ConnectorInterface $o365_connector

   *   The Office 365 connector entity.

   *

   * @return \Drupal\Core\Routing\TrustedRedirectResponse

   * @return \Symfony\Component\HttpFoundation\RedirectResponse

   *   The redirect to the set URL in config.

   *

   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException

    }

    elseif ($account->isBlocked()) {

      $this->messenger()->addError(t('The requested account is blocked'));

      return new TrustedRedirectResponse('/user/login');

      return $this->redirect('user.login');

    }

    // Log the user in.

    $this->authenticationService->saveAuthDataFromCookie();

    // Return the redirect.

    return new TrustedRedirectResponse($redirectUrl);

  }

  /**

   * Synchronizes user data with attributes in the request.

   *

   * @param \Drupal\user\UserInterface $account

   *   The Drupal user to synchronize attributes into.

   * @param array $userData

   *   The user data from o365.

   */

  protected function synchronizeUserAttributes(UserInterface $account, array $userData) {

    // @TODO: Do something with attributes like name.

    return new RedirectResponse($redirectUrl);

  }

}