code: def authenticate_request() -> Union[Authorization, Response]:
      _logger.debug("Getting token")
      error_response = make_response()
      error_response.status_code = 401
      error_response.set_data(
          "You are not authenticated. Please provide a valid JWT Bearer token with the request."
      )
      error_response.headers[
          "WWW-Authenticate"
      ] = 'Bearer error="invalid_token"'
  
      token = request.headers.get("Authorization")
      if token is not None and token.lower().startswith(BEARER_PREFIX):
          token = token[len(BEARER_PREFIX) :]  # Remove prefix
          try:
              # NOTE:
              # - This is a sample implementation for testing purposes only.
              # - Here we're using a hardcoded key, which is not secure.
              # - We also aren't validating that the user exists.
              token_info = jwt.decode(
                  token, "secret", algorithms=["HS256"]
              )
              if not token_info:  # pragma: no cover
                  _logger.warning("No token_info returned")
                  return error_response
  
              return Authorization(auth_type="jwt", data=token_info)
          except jwt.exceptions.InvalidTokenError:
              pass
  
      _logger.warning("Missing or invalid authorization token")
      return error_response
  
imports: import logging
  from typing import Union
  import jwt
  from flask import Response, make_response, request
  from werkzeug.datastructures import Authorization
label_desc: Use image node_id 1 for calling a global function with example usage: authenticate_request() and returns: error_response, Authorization, error_response