Changed the flow. No need for force login, only when you want an accessToken for more functionality.  Created a login.php for login flow.

Added all AI methods within Instagram class, needs refactoring for POST/DELETE methods which are currently not supported.

Tweaked the JS/CSS so the images are loaded in a raster with a 'load more' option & option to search for other tag.
Refactored services & AJAX implementation. Completely dynamic format, love it! Also some more error handling.
Seems to have some error on live server. (PHP version probably.) Also Instagram accesssToken is required which means you have to login. Need to find a way around this..