PIV app usecase (should we use it)

Hello!

What are the options and usecases for the PIV app of the nitrokey?

I tried this

nitropy nk3 piv info

and get

Command line tool to interact with Nitrokey devices 0.12.1
 
This feature is experimental, which means it was not tested thoroughly.
Note: data stored with it can be lost in the next firmware update.
Please pass --experimental switch to force running it anyway.
 
Aborted!

What is the admin-key?

is there a preset one? Same for PIN and PUK. Are there preset ones?

Regards

T.L.

It is experimental.