OAuth Scope for fetching data from Custom Related List

OAuth Scope for fetching data from Custom Related List

Hi.

I'm trying to fetch record related data from custom related list (a function) using Zoho API as described here 
https://www.zoho.com/crm/developer/docs/api/v7/get-related-records.html

My request:
GET /crm/v6/Campaigns/my_campaign_id/Members
Members is a API name of my custom list

However I get an error
{"code":"OAUTH_SCOPE_MISMATCH","details":{},"message":"invalid oauth scope to access this URL","status":"error"}

Which oAuth scope should I ask for such requests? I tried many, but without any success. Currently I use:
  1. ZohoCRM.functions.execute.READ
  2. ZohoCRM.settings.ALL
  3. ZohoCRM.modules.ALL
  4. ZohoCRM.org.READ
  5. ZohoCRM.users.READ
Thanks.