How to send a message in a channel in Slack when voiding a sales order?

The following is required to send a message in Slack when а sales order is voiding:

Webhook template set up according to the endpoint in Slack REST API.
User business rule configured to execute when a sales order is voiding.
The user business rule must define an action of type WEBHOOK, pointing to the code of the webhook template.

Webhook template

Below is an example of what the webhook template should contain.

Attribute name	Attribute value
Code	slack_void_01
Name	Slack - voiding a sales order
Repository name	Crm.Sales.SalesOrders
URL	https://slack.com/api/chat.postMessage?channel=<channel>&text=<{DisplayText}>
Headers	Authorization: Bearer <accessToken>
Notes	Sends a message in a Slack channel when a sales order is voiding.

Where,

<channel> - the Slack channel where the message will be sent.
{DisplayText} - the message contents. It is also an interpolated string. It will be evaluated by ERP.net and will contain the display text of the sales order (e.g., Sales Order 00108).
<accessToken> - the access token provided from Slack.

Body attribute is missing intentionally. It's not required.

А business rule that triggers when a sales order is voiding.

Repository
Crm.Sales.SalesOrders

Events

Event type	Event parameter	Execution priority
VOIDING		Normal

Actions

Action No	Action type	Parameter1 type	Parameter1 value
1	WEBHOOK	Constant	slack_void_01