Default user limit and default expiration time

When a user registers, the user can add unlimited devices but can't add more users and don't have expiration time.
To set default device limit, users.defaultDeviceLimit config can be used.
What about:

1. Default user limit? (I have tried users.defaultUserLimit, does not work)
2. Default Expiration time?

1. I don't think you can configure it.
2. There is users.defaultExpirationDays.

Thank you very much :-)

Where I can find the full list of these "users." configurations? I cannot find them in the configuration file documentation. Thanks in advance!

Only in the code.