https://docs.ansible.com/automation-controller/latest/html/userguide/credential_plugins.html

Controller can retrieve the secret key from the third party secret management systems, however the key can be set statically only. When a user wants to fetch the key per-host, it is required that the `inventory_hostname` can be configured in the definition and the key will be set in each fact data as `ansible_password` in each host dynamically.