What is the simplest way to find a slack team ID and a channel ID?

Question

We are trying to setup deep linking into slack, as described here:

https://api.slack.com/docs/deep-linking

The document states that to open a specific team,

Answer 1

If you are using the Slack app you can simply right click on the channel name in the left menu and click Copy link, paste it somewhere and you will see the channel id.