Magic-link sign-in, no seat consumed
External users authenticate via short-lived, single-use email links — no password for you to manage, no license for them to burn.
- 15-minute, SHA-256 hashed, single-use tokens; constant-time verification.
- 8-hour session cookie scoped to /external — never touches the main app auth.
- Per-user expiry window + admin-driven disable — access vanishes the day the contract ends.
- Magic-link emails ship via the same trial mailer, with your branding.