OTP authentication in the softether VPN Client

I setup the softether vpn server in my ubuntu server and also installed the softether vpn client in my windows machine.

by following this link.

softether vpn server setup

Now I created the user in my vpn server manager

user: user1

Now I want to know is there any way by which we can connect to the softether VPN client using the OTP authentication

Right now it just get connected by using username and password. I want something like 2 factor in which it also ask for OTP.