TokenException: Incorrect `api_key` or `access_token`.

I have been trying to read historical data. By using the API key and access token i am able to fetch the instrument details but the moment i run the code to fetch the data it says invalid key, access token. I have verified multiple times that the key and token are correct however just when i run the code to fetch the data it fails.. any suggestions please.. I am new to this and feeling very overwhelmed....




File ~\anaconda3\Lib\site-packages\kiteconnect\connect.py:937, in KiteConnect._request(self, route, method, url_args, params, is_json, query_params)
935 # native Kite errors
936 exp = getattr(ex, data.get("error_type"), ex.GeneralException)
--> 937 raise exp(data["message"], code=r.status_code)
939 return data["data"]
940 elif "csv" in r.headers["content-type"]:

TokenException: Incorrect `api_key` or `access_token`.