code: def create_user_folder(path):
      path = pathlib.Path(path)
      if path.exists():
          return
      path.mkdir(parents=True)
      head = pd.DataFrame(columns=("user_id", "add_date"))
      head.to_csv(path / "users.csv", index=None)
  
file_path: qlib/qlib/contrib/online/utils.py
imports: import pathlib
  import pickle
  import yaml
  import pandas
  from ...data import D
  from ...config import C
  from ...log import get_module_logger
  from ...utils import get_next_trading_date
  from ...backtest.exchange import Exchange
label_desc: Use image node_id 3 for calling a global function with example usage: create_user_folder(path) without return types