Replaces part of this API key's ArrowMem Guard alert relay enrolment. Argument: {"scope": "topic"|"family"|"both"} (required). scope="topic" replaces the relay token only (the old topic gets one notice that it is changing, then stops being used) - your family link keeps working. scope="family" replaces the family link only (the old one stops working) and returns the new link - your topic is unchanged. scope="both" does both. Your key, usage, cap and subscription are untouched. Requires an existing enrolment (enrol_alert_relay). Paid tool - requires a valid API key. Spends one call.