REST API - Remove User Access Not Working

I want to revoke user access to a dataset using REST APIs. According to the documentation, I can use this API endpoint with `datasetUserAccessRight: None` to remove all the dataset permissions of the specified user.

Upon using this API endpoint, I get a 200 successful response, but the user still has access to the dataset. I also tried refreshing the user permissions as mentioned here.

Is there a bug in the API itself or is my request wrong?

EDIT: This issue happens only when I first grant access to a user via this API endpoint. After this, I can confirm that the user has been given the permissions using this API endpoint as well as by manually checking in PowerBI under Manage Permissions. Now, if I try to revoke access using this API endpoint, the user permission IS removed when checking using this API endpoint as well as in PowerBI Manage Permissions. However, the user still has access to the dataset.

SOLUTION: There was a link configured for the dataset that allowed Read access to everyone in the organization. Thus, even though I revoked the permission individually for the user, they were still able to view because of the link. Removing the global read access link solved the issue.

    headers = {
        'Content-Type': 'application/json',
        'Authorization': f'Bearer {access_token}'
    }

    api_url = f'https://api.powerbi.com/v1.0/myorg/groups/{group_id}/datasets/{dataset_id}/users'

    share_details = {
        "identifier": user,
        "principalType": "User",
        "datasetUserAccessRight": "None"
    }

    response = requests.put(api_url, headers=headers,
                            data=json.dumps(share_details))