Fail trying to create an identity with an empty password #24
Description
It is currently possible to create an identity (of type password) with an empty password. We might wish to fail that. We can't just declare min_length in the pydantic schema for this because it's perfectly valid to create an identity of type pubkey which will have a NULL password.
Unless we wish to check for that condition in code we'll need to split the schemas (e.g. IdentityCreatePubkeySchema and IdentityCreatePasswdSchema)