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

The answer marked correct here does not work for me, but I may have found an even easier way with test tokens.

1. Create a test token: https://api.slack.com/docs/oauth-test-tokens

2. Scroll down to the "try it now!" button. You land on auth.test: https://api.slack.com/methods/auth.test/test

3. Choose the team you want to test and click Test Method. You can find your team_id (and user_id) there.

4. Do the same for channels.list. You can click "View Another Method" and search or go to: https://api.slack.com/methods/channels.list/test

5. Choose the team again and Test Method. Cmd+F through the channels object looking for whatever channel_ids you need.