Issue #3309289: Error 500 when fetching auth token

namespace Drupal\phpmailer_oauth2\Service;

use Drupal\Core\Config\ConfigFactoryInterface;

use Drupal\Core\Logger\LoggerChannelFactory;

use Drupal\Core\Logger\LoggerChannelFactoryInterface;

use Symfony\Component\HttpFoundation\RequestStack;

use TheNetworg\OAuth2\Client\Provider\Azure;

  /**

   * The logger interface.

   *

   * @var \Drupal\Core\Logger\LoggerChannelFactory

   * @var \Drupal\Core\Logger\LoggerChannelFactoryInterface

   */

  protected $logger;

   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack

   *   The request stack.

   */

  public function __construct(ConfigFactoryInterface $config_factory, LoggerChannelFactory $logger_channel, RequestStack $request_stack) {

  public function __construct(ConfigFactoryInterface $config_factory, LoggerChannelFactoryInterface $logger_channel, RequestStack $request_stack) {

    $this->configFactory = $config_factory;

    $this->logger = $logger_channel;

    $this->requestStack = $request_stack;