(SOLVED) Restrict store access by customer group multistore

I have two stores, one for retail and one for wholesale. Accordingly, I have two customer groups, retail and wholesale. Wholesale group customers must be approved. Anyone willing to create me a custom module/extension so that only wholesale group customers can access the wholesale site and only retail customers can access the retail store? Wholesale group customers should not be able to login to the retail store and retail customers should not be able to login to the wholesale store.

Any help is greatly appreciated.

OpenCart 2.0.3.1

Found an extension that does exactly this. It does not say it is for version 2.0.3.1 but since it is free, I tried it and it works!

http://www.opencart.com/index.php?route ... oup&page=2