This is a very simple example of the new Cogswell.io Pub/Sub product. It is a command-line chat client which can be bound to any user's Cogswell account.
Simple create a JSON file containing a keys property which is an array with read and write auth keys.
Then launch the chat client using your custom JSON config file, a username, and a channel
$ cogs-chat -f path/to/custom.json MyUserName ChatChannel