Save `self` property received when doing `rtm.start` as described here: https://api.slack.com/methods/rtm.start
Save `self` property received when doing `rtm.start` as described here: https://api.slack.com/methods/rtm.start

This contains information about the bot `id` and `name` which is very useful.

greenlikeorange/slack-bot-api,oscar-b/slack-bot-api,mishk0/slack-bot-api,ferfabricio/slack-bot-api