title: groovy or pipleline script to send notification to Slack from Jenkins
body: <p>I need to use Webhooks to send notification to slack from jenkins. I am well aware of notifier plugin, but for that I would require access in Slack which client doesnt want to provide. They have provided Webhook url details. Anyone has any idea how i can post notification(Job name, link, user who ran it, and cause of error(if)) to slack</p>