Gets called when POS is being registered in Deliverect. For instance when a new customer adds a location you will receive the register event. After this event it should be possible to sync products and insert orders into the POS. Webhook payload contains information such as: * Deliverect account id (accountId) * Deliverect location id (locationId) * External location id provided by the POS (externalLocationId) We always expect a JSON result which contains the endpoints to: * Sync products from the POS to Deliverect (syncProductsURL) * Insert order from Deliverect to the POS (ordersWebhookURL) * Sync tables from the POS to Deliverect (syncTablesURL) * Sync floors from the POS to Deliverect (syncFloorsURL) If an endpoint is empty or not included in this response we will not use it.