[WP] Creating RoyalSlider from Instagram photos
Important note: At Nov 2015 Instagram changed its API and will review your application before it can go live. If you avoid the review, the application will be in Sandbox mode. This mode allows up to 500 requests per hour (which is more than enough for RoyaSlider, as it caches data for 24 hours by default), but you can retrieve photos only from the user that is connected. More info at https://www.instagram.com/developer/sandbox/ or http://www.engadget.com/2015/11/18/rip-instagram-feed-reading-apps/
Which means, without the review you can display only images from the account that was used to create an API key.