contacts-groups-{groupId}-members

Number of APIs: 3

1. Add contact group members POST {{baseUrl}}/contacts/groups/:groupId/members

2. Remove members in a contact group DELETE {{baseUrl}}/contacts/groups/:groupId/members?member_ids=<string>

3. List contact group members GET {{baseUrl}}/contacts/groups/:groupId/members?page_size=10&next_page_token=<string>