code: def _maybe_migrate_to_yaml(q: Q):
      """
      Migrate user settings from a pickle file to a YAML file.
      """
      # prior, we used to save the user settings in a pickle file
      old_usersettings_path = os.path.join(
          get_database_dir(q), f"{get_user_id(q)}.settings"
      )
      if not os.path.isfile(old_usersettings_path):
          return
  
      try:
          with open(old_usersettings_path, "rb") as f:
              user_settings = pickle.load(f)
  
          secret_name, secrets_handler = _get_secrets_handler(q)
          logger.info(f"Migrating token using {secret_name}")
          for key in SECRET_KEYS:
              if key in user_settings:
                  secrets_handler.save(key, user_settings[key])
  
          with open(_get_usersettings_path(q), "w") as f:
              yaml.dump(
                  {
                      key: value
                      for key, value in user_settings.items()
                      if key in USER_SETTING_KEYS
                  },
                  f,
              )
          os.remove(old_usersettings_path)
          logger.info(
              f"Successfully migrated tokens to {secret_name}. Old file deleted."
          )
      except Exception as e:
          logger.info(
              f"Could not migrate tokens. "
              f"Please delete {old_usersettings_path} and set your credentials again."
              f"Error: \n\n {e} {traceback.format_exc()}"
          )
  
imports: import errno
  import functools
  import logging
  import os
  import pickle
  import signal
  import traceback
  from typing import Any, List
  import keyring
  import yaml
  from h2o_wave import Q, ui
  from keyring.errors import KeyringLocked, PasswordDeleteError
  from llm_studio.app_utils.config import default_cfg
  from llm_studio.app_utils.utils import get_database_dir, get_user_id
label_desc: Use image node_id 10 for calling a global function with example usage: _maybe_migrate_to_yaml(q) without return types