In a logistics system, a registration state machine is not complete when user creation inserts a row: email code delivery and verification must be separate, auditable transitions. The operational constraint is auditability: every change from an unverified address to an active account must be exp...
Source: [Dev.to](https://dev.to/knoxblackwood2375/registration-state-machines-explained-user-creation-email-code-delivery-and-verification-34o4)