Rotate an API key for a service user.
Creates a new key. By default revokes the old key; set revoke_current=false for graceful rollover where both keys remain active temporarily. Returns 404 if the key is not found, 400 if the key is not active.
ManageServiceUsers permission at the enterprise level.Service User credential (prefix: cog_)
Service user ID (prefix: service-user-)
"service-user-abc123def456"