GL AR750S OpenVPN Server Setup

I have the GL AR750s and am trying to figure out how to set it up as a OpenVPN Server. I have successfully used it as a OpenVPN Client however. My experience has been using the stock Asus firmware with a an Asus RT-AC68U wireless router and it has worked easily using a Username and Password. I don’t see that option within the GL AR750s. Is there an FAQ or any Tutorials anywhere on how to set it up?
I have the unit running firmware 3.009
Any help would be much appreciated.

The OpenVPN server missing lot of features so far. We will add more feature in the future.

You can refer to this thread.