openai.AuthenticationError: Error code: 401 - {'error': {'message': 'Incorrect API key provided: 3a03c59b********************1c2d. You can find your API key at https://platform.openai.com/account/api-keys.', 'type': 'invalid_request_error', 'param': None, 'code': 'invalid_api_key'}}
retriever = index.as_retriever(similarity_top_k=2) nodes = retriever.retrieve("query")