Fine-grained users and SSH keys management

We want to be able to create users on certain hosts or groups.

We should be able to define the user's groups (e.g. if the user is part of sudoers), the user's status (present / absent), and of course their SSH public keys.

In the Ansible structure, the user's SSH keys are stored inside a repository. This repository also contains a main.yml config file with the list of groups and the user's status.