I accidentally entered through the creation of a password for the secret store that I hit when running Get-Secret:
> Get-Secret -AsPlainText -Name testsecret
Creating a new SecretStore vault. A password is required by the current store configuration.
Enter password:
Enter password again for verification:
At that point I'd entered an empty password, but the module didn't complain or anything.
Given that no password is a separate configuration, I'd expect to be prevented from doing this.