Make it clear that the api key is missing when config is invalid.
Make it clear that the api key is missing when config is invalid.

gtd/honeybadger-ruby,Workable/honeybadger-ruby,honeybadger-io/honeybadger-ruby,Workable/honeybadger-ruby,gtd/honeybadger-ruby,honeybadger-io/honeybadger-ruby,kylerippey/honeybadger-ruby,kylerippey/honeybadger-ruby