/**
  * Register any application services.
  *
  * @return void
  */
 public function register()
 {
     $this->app->configure('slack');
     $this->app->singleton(SlackBot::class, function ($app) {
         // Instiate the bot with a token
         $bot = new SlackBot(config('slack.token'));
         // Set config array
         $bot->setConfig(config('slack'));
         // Add reactors from config file
         foreach (array_keys(config('slack.reactors')) as $reactorClass) {
             $bot->addReactor(new $reactorClass());
         }
         // Return bot
         return $bot;
     });
 }