# 401 Error: Authentication credentials not found. **URL:** \ **Category:** APIs & Integrations\ **Tags:** oauth\ **Created:** [July 6, 2023, 8:20am UTC](https://community.hubspot.com/t/401-error-authentication-credentials-not-found/84789 "2023-07-06T08:20:33Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![PMunar](https://avatars.discourse-cdn.com/v4/letter/p/ac91a4/32.png) [@PMunar](https://community.hubspot.com/u/PMunar)\ **Post date:** [July 6, 2023, 8:20am UTC](https://community.hubspot.com/t/401-error-authentication-credentials-not-found/84789/1 "2023-07-06T08:20:33Z")
Dear hubspot community, I am writing because I am experiencing some strange problem. Yesterday I wrote a small python script to get the “feedback\_submissions” data from one of our hubspot accounts. It worked fine and I could retrieve data normally. Today I tried again to retrieve the same data (the script did not change at all) and I got the 401 error (see code and error below). Can anyone help me understand what can be happening? The code I am executing is the following: `import hubspotfrom pprint import pprintfrom hubspot.crm.objects.feedback_submissions import ApiExceptionclient = hubspot.Client.create(access_token="my_access_token")try:api_response = client.crm.objects.feedback_submissions.basic_api.get_page(limit=1, archived=False, properties=['hs_sentiment', 'hs_survey_type'])print(api_response)except ApiException as e:print("Exception when calling basic_api->get_page: %s\n" % e)` In my case, the variable “my\_access\_token” has the actual access token that I get when I created the private app within my hubspot account, with the correct scopes. And the error I get is: ```auto Exception when calling basic_api->get_page: (401) Reason: Unauthorized HTTP response headers: HTTPHeaderDict({'Date': 'Thu, 06 Jul 2023 07:53:52 GMT', 'Content-Type': 'application/json;charset=utf-8', 'Content-Length': '299', 'Connection': 'keep-alive', 'CF-Ray': '7e2646c6eb982fbb-MAD', 'CF-Cache-Status': 'DYNAMIC', 'Strict-Transport-Security': 'max-age=31536000; includeSubDomains; preload', 'Vary': 'origin, Accept-Encoding', 'Access-Control-Allow-Credentials': 'false', 'x-envoy-upstream-service-time': '3', 'x-evy-trace-listener': 'listener_https', 'x-evy-trace-route-configuration': 'listener_https/all', 'x-evy-trace-route-service-name': 'envoyset-translator', 'x-evy-trace-served-by-pod': 'iad02/hubapi-td/envoy-proxy-598c95b5b7-79ph8', 'x-evy-trace-virtual-host': 'all', 'X-HubSpot-Auth-Failure': '401 Unauthorized', 'X-HubSpot-Correlation-Id': 'c949e659-d2dd-44f5-a77b-ffbcded8b98d', 'x-request-id': 'c949e659-d2dd-44f5-a77b-ffbcded8b98d', 'X-Trace': '2B9FE3E2A7DC4E6CFB4AFD766A17C77E79B265D346000000000000000000', 'Report-To': '{"endpoints":[{"url":"https:\\/\\/a.nel.cloudflare.com\\/report\\/v3?s=IiJ06vzh2w4NUK1cIIHQMApGMMV1itYrNWljQQPQgohUCfJgQYFjsUTcziC0CEK4trOABdt2Ts5jX7Jz60PTM%2BvrFxqiZsBJ%2F5ybeayujIZmEI%2BCBNXJ4FdPBxJHIZsG"}],"group":"cf-nel","max_age":604800}', 'NEL': '{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}', 'Server': 'cloudflare', 'alt-svc': 'h3=":443"; ma=86400'}) HTTP response body: {"status":"error","message":"Authentication credentials not found. This API supports OAuth 2.0 authentication and you can find more details at https://developers.hubspot.com/docs/methods/auth/oauth-overview","correlationId":"c949e659-d2dd-44f5-a77b-ffbcded8b98d","category":"INVALID_AUTHENTICATION"} ``` As said, yesterday it worked and now it does not without changing the code. Thanks in advance! ---
**Author:** ![skimura](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@skimura](https://community.hubspot.com/u/skimura)\ **Post date:** [July 6, 2023, 10:38am UTC](https://community.hubspot.com/t/401-error-authentication-credentials-not-found/84789/2 "2023-07-06T10:38:47Z")
@PMunar Hi. How about try this? Quote: README ```lia-code-sample # client = hubspot.Client.create(access_token="my_access_token") client = HubSpot(access_token='your_access_token') ``` > **[GitHub - HubSpot/hubspot-api-python: HubSpot API Python Client Libraries for V3 version...](https://github.com/HubSpot/hubspot-api-python)** > > HubSpot API Python Client Libraries for V3 version of the API > This method may not be suitable. ```lia-code-sample def create(cls, **kwargs): return cls(**kwargs) ``` Thanks. ---
**Author:** ![PMunar](https://avatars.discourse-cdn.com/v4/letter/p/ac91a4/32.png) [@PMunar](https://community.hubspot.com/u/PMunar)\ **Post date:** [July 6, 2023, 2:56pm UTC](https://community.hubspot.com/t/401-error-authentication-credentials-not-found/84789/3 "2023-07-06T14:56:00Z")
Hi @skimura , I have also tried the method you suggest and also this variation: ```auto from hubspot import HubSpot api_client = HubSpot() api_client.access_token = 'your_access_token' ``` but it does not work either. As I said, yesterday it worked fine and today it does not. I cannot figure out why. ---
**Author:** ![skimura](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@skimura](https://community.hubspot.com/u/skimura)\ **Post date:** [July 7, 2023, 12:14am UTC](https://community.hubspot.com/t/401-error-authentication-credentials-not-found/84789/4 "2023-07-07T00:14:16Z")
@PMunar I tried your code and it worked. Is your `hubspot-api-client` is latest? In my case, same error happned. So I updated the library version. `pip install --upgrade hubspot-api-client` I ran it again and it was successful. Please check library version. If it’s not the latest version, try updating it. Thanks. ---
**Author:** ![PMunar](https://avatars.discourse-cdn.com/v4/letter/p/ac91a4/32.png) [@PMunar](https://community.hubspot.com/u/PMunar)\ **Post date:** [July 11, 2023, 12:55pm UTC](https://community.hubspot.com/t/401-error-authentication-credentials-not-found/84789/5 "2023-07-11T12:55:37Z")
Hi! It turned out it was due to some libaray issue. Your suggestion regarding an update to the hubspot api library made me think about it.