Invalid API Key when using claude 2.0

Problem

Windows 11 with Pythno 3.10 and used these codes . It turned out to an "Invalid API Key" error. But I'm sure the api_key is good because I could get good response via unofficial API call (from other github repository). from anthropic import Anthropic, HUMAN_PROMPT, AI_PROMPT anthropic = Anthropic(api_key = "sk-ant-XXXXXX") def getResponse(prompt): msg=f"{HUMAN_PROMPT} {prompt} {AI_PROMPT}" print(msg) completion = anthropic.completions.create( model = "claude-2", max_tokens_to_sample = 30000, prompt = msg, ) res = completion.completion print(res) return res if __name__ == "__main__": getResponse("Hello, Claude") the last 3 lines of error messages: File "D:\Python310\anthropic\lib\site-packages\anthropic\_base_client.py", line 761, in _request raise self._make_status_error_from_response(request, err.response) from None anthropic.AuthenticationError: Error code: 401 - {'error': {'type': 'authentication_error', 'message': 'Invalid API Key'}} Appreciate your help. Thanks.