public static function getCurrentAppKey(Request $request = null)
    {
        $request = $request ?: app('request');

        return $request->attributes->get(static::CURRENT_APP_KEY);
    }
public static function getCurrentAppKey(Request $request = null)
    {
        $request = $request ?: app('request');

        return $request->attributes->get(static::CURRENT_APP_KEY);
    }
public static function getCurrentAppKey ( Request $ request = null ) { $ request = $ request ? : app ( 'request' ) ; return $ request -> attributes -> get ( static :: CURRENT_APP_KEY ) ; }
Get the app key of the current api client.

@param  \Illuminate\Http\Request|null  $request
@return string|null
Get the app key of the current api client .