The command line application is used to get secrets, environments, certificates… from your terminal.
You can create bash style env(s) and then run your local and remote applications with the environment variables injected.

All your passwords (secrets) are transferred over TLS 1.3 using the most up to date ciphers, keeping your information secure.
There is no need to have to download and store local copies of environment or config files, which can get lost or stolen.

Install & Configure CLI
Learn Basics
Running Apps in Envs