I am getting below email from slack:  The links in that email: * [rtm.start Web API method](https://api.slack.com/methods/rtm.start) * [rtm.connect](https://api.slack.com/methods/rtm.connect) * [Socket Mode](https://api.slack.com/apis/connections/socket) * [Upcoming changes to rtm.start](https://api.slack.com/changelog/2021-10-rtm-start-to-stop) * [How to prepare for changes to rtm.start](https://api.slack.com/changelog/2021-10-rtm-start-to-stop#how)