It’s a AddOn of the existing product vCard-Saas :
https://codecanyon.net/item/infyvcardssaas-multi-user-business-card-builder-saas-vcards/35815965
Slack Integration AddOn for vCard-Saas
It will send real-time Slack notifications to the configured Slack webhooks whenever a new user registers, a plan is purchased, a vCard is created, or any other user-selected action occurs.
Download Slack Integration Add On for vCard Saas | Laravel vCard Saas
