code: def ai21_completion_call_bad_key():
      try:
          api_key = "bad-key"
          response = completion(
              model="j2-ultra",
              messages=messages,
              stream=True,
              api_key=api_key,
          )
          print(f"response: {response}")
          complete_response = ""
          start_time = time.time()
          for idx, chunk in enumerate(response):
              chunk, finished = streaming_format_tests(idx, chunk)
              if finished:
                  break
              complete_response += chunk
          if complete_response.strip() == "":
              raise Exception("Empty response received")
          print(f"completion_response: {complete_response}")
      except:
          pytest.fail(f"error occurred: {traceback.format_exc()}")
  
imports: import sys, os, asyncio
  import traceback
  import time, pytest
  from dotenv import load_dotenv
  import litellm
  from litellm import completion, acompletion, AuthenticationError, BadRequestError, RateLimitError, ModelResponse
label_desc: Use image node_id 21 for calling a global function with example usage: ai21_completion_call_bad_key() without return types