STOP

These aren't the droids you're looking for.

You probably don't want to use greenlock directly.

Instead, look here:

Webservers

For any type of webserver (express, hapi, koa, connect, https, spdy, etc), you're going to want to take a look at greenlock-express.

For any type of CLI (like what you want to use with bash, fish, zsh, cmd.exe, PowerShell, etc), you're going to want to take a look at greenlock-cli.

Well, take a look at the API in the main README and you can also check out the code in the repos above.

Feel free to open an issues to request any particular type of example.