I can't get panelist list

API Endpoint(s) and/or Zoom API Event(s)
get/webinars/{webinarId}/panelists

Description
I am unable to retrieve the list of webinar panelists.
I have confirmed the access token is valid since I was able to create a new webinar.
I have manually added panelists for the relevant webinar ID.
I am attempting to retrieve it using the python code below.
Please tell me what is wrong.


import requests

theUrl = 'https://api.zoom.us/v2/webinars/' + strWebinarId + '/panelists'
hv = { "Authorization": "Bearer " + strAccessToken }
response = requests.get(theUrl, headers=hv)

Error?
response is <Response [400]>