bind auth related to bots for messaging apps to broker

[usriva2405]

Idea would be for users to be able to configure bot auths for each broker. So as a user, if I have multiple projects (or brokers in our case) (for e.g. HR project, bank project etc), each project could individually support a bot specific to that project on multiple social media platforms.

Now I don't know about FB, Slack, Skype, Wechat, but Telegram has a auth token which binds to a bot (assuming rest also work in similar fashion.)

So every auth token for every bot should be configured at broker level.