code: def _mlflow_job_name(index: int, user: str = None) -> str:
      user = user or u.current_user()
      timestamp = datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
      return f"{user}-{timestamp}-{index}"
  
file_path: caliban/caliban/util/metrics.py
imports: import datetime
  import json
  import os
  import caliban.util
  import caliban.history.types
  from contextlib import contextmanager
  from typing import Dict, Any, List, Optional
label_desc: Use image node_id 6 for calling a global function with example usage: _mlflow_job_name(index, user) and returns: user, str, timestamp, str, index