keep up with folder auth api changes.

mdrsclient/api/folder.py

@@ -1,5 +1,6 @@
 from typing import Final
 
+import requests
 from pydantic import parse_obj_as
 from pydantic.dataclasses import dataclass
 
@@ -75,11 +76,9 @@ class FolderApi(BaseApi):
         data = {"password": password}
         token_check(self.connection)
         response = self.connection.post(url, data=data)
-        # stupid! always returned status code 200
-        self._raise_response_error(response)
-        data = response.json()
-        if data.get("status") is not True:
+        if response.status_code == requests.codes.unauthorized:
             raise UnauthorizedException("Password is incorrect.")
+        self._raise_response_error(response)
         return True
 
     def acl(self, id: str, access_level: int, recursive: bool, password: str | None) -> bool: