Using auth-user-pass-verify on RouterOS OpenVPN

Hello All,

I am new to the Mikrotik RouterOS and will appreciate any help I can get.
I own an RB2011UiAS-RM routerboard with routerOS version 6.7 installed, currently I want to set up vpn server (OVPN) using script authentication. So basically the client will be authenticated to another local server that have database of user using PHP.
Is that possible with routerOS? since I didn’t find any guide and hint about it?

Thank you very much for your kind support.
Shopy