protected function registerConfig()
    {
        // Config options
        $configIndex = FileConfig::FILE_NAME;
        $configFileName = FileConfig::FILE_NAME.'.php';
        $configPath = __DIR__.'/../../config/'.$configFileName;

        // Publish the config
        $this->publishes([
            $configPath => config_path($configFileName),
        ]);

        // Merge the default config to prevent any crash or unfilled configs
        $this->mergeConfigFrom(
            $configPath,
            $configIndex
        );

        return $this;
    }