Adds parameter type hints.

Co-authored-by: Côme Chilliet <come.chilliet@nextcloud.com>
Signed-off-by: Faraz Samapoor <fsa@adlas.at>
Signed-off-by: Faraz Samapoor <f.samapoor@gmail.com>

apps/files_external/lib/Command/Import.php

@@ -181,7 +181,7 @@ class Import extends Base {
 		}
 	}
 
-	protected function getStorageService($userId): StoragesService {
+	protected function getStorageService(string $userId): StoragesService {
 		if (empty($userId)) {
 			return $this->globalService;
 		}

apps/files_external/lib/Command/ListCommand.php

@@ -242,7 +242,7 @@ class ListCommand extends Base {
 		}
 	}
 
-	protected function getStorageService($userId): StoragesService {
+	protected function getStorageService(string $userId): StoragesService {
 		if (empty($userId)) {
 			return $this->globalService;
 		}