Where can I find documentation on the Responsys Account Management API?

Summary:

I'm looking for documentation related to Responsys user management through one of the APIs (or alternative external user management methods). The documentation available here (https://docs.oracle.com/en/cloud/saas/marketing/responsys-develop/index.htm) does not reference managing users, only getting basic user info. But the Oracle Support Chatbot confirmed there is a account management API for actively managing users and their roles.

ORACLE SUPPORT CHATBOT (provided the following information):
To manage users via API in Oracle Responsys Marketing Platform Cloud Service, you can utilize the Account Management REST/SOAP APIs. These APIs enable you to create users, update user details, deactivate users, assign or remove roles, and manage access groups, even when Single Sign-On (SSO) is not enabled.