Comment 1 for bug 1549418

It looks like there are two issues here:

1. There's no mention in the Python API docs on how to get the private key that was generated.

2. There's no CLI option for saving the private key to a file.

We'll use this bug to track the former. For the latter, you can just propose a patch that adds the option. At most, you might be requested to create a blueprint for it, for tracking.