/**
  * Register the service provider.
  *
  * @return void
  */
 public function register()
 {
     $this->registerConfiguration();
     $this->app->singleton(Forecast::class, function () {
         $forecast = new Forecast(config('laravel-forecast.API_KEY'));
         if (!empty(config('laravel-forecast.options'))) {
             $forecast->setOptions(config('laravel-forecast.options'));
         }
         return $forecast;
     });
 }