Good, this is a feature that would be a must have.
An integration with the pterodactyl game panel would give a whole new range of possibilities. Pterodactyl is a free, open-source game server management panel built with PHP, React, and Go. Designed with security in mind, Pterodactyl runs all game servers in isolated Docker containers while exposing a beautiful and intuitive UI to end users.
Here is information about your WHCMS module
https://github.com/pterodactyl/whmcs
Also the API documentation
https://dashflo.net/docs/api/pterodactyl/v1/