[BUGFIX] PHP 8 fix

Classes/Service/VimeoService.php

 <?php
 
-namespace SGalinski\SgVimeo\Service;
-
 /***************************************************************
  *  Copyright notice
  *
@@ -26,6 +24,8 @@ namespace SGalinski\SgVimeo\Service;
  *  This copyright notice MUST APPEAR in all copies of the script!
  ***************************************************************/
 
+namespace SGalinski\SgVimeo\Service;
+
 use Psr\Log\LoggerAwareInterface;
 use Psr\Log\LoggerAwareTrait;
 use TYPO3\CMS\Core\Registry;
@@ -166,7 +166,7 @@ class VimeoService implements LoggerAwareInterface {
 	 */
 	protected function requestAccessToken(): void {
 		$token = $this->vimeoApiClient->clientCredentials(self::SCOPE);
-		if ($token['body']['access_token']) {
+		if (isset($token['body']['access_token'])) {
 			$this->vimeoApiClient->setToken($token['body']['access_token']);
 		}
 	}