code: def validate_config_path(
      config: Optional[Union[Text, "Path"]],
      default_config: Text = DEFAULT_CONFIG_PATH,
  ) -> Text:
      """Verifies that the config path exists.
  
      Exit if the config file does not exist.
  
      Args:
          config: Path to the config file.
          default_config: default config to use if the file at `config` doesn't exist.
  
      Returns: The path to the config file.
      """
      config = rasa.cli.utils.get_validated_path(
          config, "config", default_config
      )
  
      if not config or not os.path.exists(config):
          print_error(
              "The config file '{}' does not exist. Use '--config' to specify a "
              "valid config file."
              "".format(config)
          )
          sys.exit(1)
  
      return str(config)
  
imports: import json
  import argparse
  import logging
  import os
  import sys
  import time
  from types import FrameType
  from typing import Any, Dict, List, Optional, TYPE_CHECKING, Text, Union, overload
  import randomname
  import rasa.shared.utils.cli
  import rasa.shared.utils.io
  from rasa.shared.importers.importer import TrainingDataImporter
  from rasa.shared.constants import ASSISTANT_ID_DEFAULT_VALUE, ASSISTANT_ID_KEY, DEFAULT_CONFIG_PATH
  from rasa.shared.utils.cli import print_error
  from rasa import telemetry
label_desc: Use image node_id 6 for calling a global function with example usage: validate_config_path(config, default_config) and returns: str