Getting 401: Authentication failed for CloudKit Server-to-Server communication

Hello,

I have been recently exploring the CloudKit and related frameworks. I got the communication with my app working, as well as with my website using CloudKitJS. Where I am struggling is the Server-to-Server communication (which I would need for exporting data from public database in csv.

I have tried Python package requests-cloudkit, which others were suggesting. I have created a Server-to-Server token, and have copied only the key between START and END line once creating the eckey.pem file. I then got this code:

Code Block python
from requests_cloudkit import CloudKitAuth
from restmapper import restmapper
import json
KEY_ID = '[my key ID from CK Dashboard]'
SECRET_FILE_KEY = 'eckey.pem'
AUTH = CloudKitAuth(KEY_ID, SECRET_FILE_KEY)
PARAMS = {
		'query':{
				'recordType': '[my record type]'
		},
}
CloudKit = restmapper.RestMapper("https://api.apple-cloudkit.com/database/1/[my container]/development/")
cloudkit = CloudKit(auth=AUTH)
response = cloudkit.POST.public.records.query(json.dumps(PARAMS))

I am then getting the 401 Authentication failed response. I am stuck on this for days, so I would be grateful for any help or advice. 😊