Send message using slack api

• You need to make channel in your slack workspace chat

• Go to api.slack.com

• Create 'App'

• Enable 'Incoming Webhooks'

• Add 'Webhook to Workspace'

• Select your channel which you created

• Allow it

• Go to 'OAuth & Permissions'

• Add 'Scopes'

  • chat:write
  • channels:read

• 'Reinstall your workspace' once you allow above changes through notification if pop-up

• Go to 'Incoming Webhooks' and copy 'Webhook url' and use in the project