CHW-5101 ServiceUnavailable

a required dependency is not available; retry shortly or contact the operator

Default message: a required dependency is not available; retry shortly or contact the operator
HTTP status: 503 (server)

Problem. A required dependency (user store, email sender, TOTP encryption key) is not wired for this request. Cause. The server started without its persistent DB, or an operator has not provisioned the dependency. Fix. Retry shortly; if the error persists, contact the operator to check the /healthz endpoint for the failing dependency. HTTP 503.