changed API endpoint from v2 to v3.

mdrsclient/commands/metadata.py

@@ -2,7 +2,7 @@ import json
 from argparse import Namespace
 from typing import Any
 
-from mdrsclient.api import FolderApi
+from mdrsclient.api import FoldersApi
 from mdrsclient.commands.base import BaseCommand
 
 
@@ -26,6 +26,6 @@ class MetadataCommand(BaseCommand):
         connection = cls._create_connection(remote)
         laboratory = cls._find_laboratory(connection, laboratory_name)
         folder = cls._find_folder(connection, laboratory, r_path, password)
-        folder_api = FolderApi(connection)
+        folder_api = FoldersApi(connection)
         metadata = folder_api.metadata(folder.id)
         print(json.dumps(metadata, ensure_ascii=False))