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

As of 2017, it looks like slack made it easier to find.

Here is the easiest way to manually find the Team IDs.

Visit your slack room via a web browser. Right Click > "View Source"

And search for Team_id: