The current keystore only support a file-based format; it would be nice to be able to plug any keystore and be able to use it.

Possible keystore:

• vault?
• kubernetes secrets

Steps required:

• Split the interface into two new interfaces: Keystore and EditableKeystore, not all keystore can be edited on the CLI.
• Add configuration options to change the type
• Link the keystore with the plugin system.