Twitch chat bot: Detect wrong credentials

The IRC chat bot of the the TwitchChatConnector should detect wrong credentials, and not simply show a connection error after to much failures.

See: https://github.com/codeoverflow-org/chatoverflow/blob/1cd8df66a2cc712ae39466ec09706c41a271d846/src/main/scala/org/codeoverflow/chatoverflow/requirement/service/twitch/chat/TwitchChatConnector.scala#L108