OAuth2 token endpoint returning 401 with valid client credentials in Python

NICE CXone API & Integrations
1

Hit a 401 error when hitting https://api.mypurecloud.com/oauth/token from our Python backend. The goal is to grab an access token to inject into the X-G2-User-ID header for downstream Data Action tracing.

import requests

resp = requests.post(
 'https://api.mypurecloud.com/oauth/token',
 data={'grant_type': 'client_credentials'},
 auth=(CLIENT_ID, CLIENT_SECRET)
)

Response is just {"error": "invalid_client"}. Checked the secret multiple times. Is the base URL different for our region?