When an opportunity stage is Closed Won, an email is sent to desingated people using the workflow notification.
Now we like to build one step further.
Our company use Slack to communicate internally.
We would like to post win alerts on slack  "Sales Wins" channel when an opportunity stage is "Closed Won."

Where do I get the ID to add the slack channel ti send win alert?

Hello Experts,

Just a newbie here. Do you have any resources where I can have a reference for Salesforce to Slack Integration. We want to integrate our Salesforce to Slack and based from the resources I found so far, this is for Opportunity Records only. Can you guide me in creating class where every time there is a record created, there will be post on Slack? 

Here is the link that I found: 
http://coenraets.org/blog/2016/01/slack-salesforce-integration/
http://coenraets.org/blog/2016/01/slack-salesforce-integration-part-2/

Appreciate any response here. Thank you.