We have several clients using OpenVPN in one form or another but I was playing around with the OpenVPN appliance available for download here:

https://openvpn.net/index.php/access-server/download-openvpn-as-vm.html

As a side note -- they warn you against using VMWare Player.  While I didn't use Player, I was testing it out in VMWare Workstation 11 and it works perfectly. 

The installation was straightforward and fast but when I attempted to login, my credentials didn't work.  As they suggested, I changed the local root account password but neither the default password or my new password would let me login.  After a quick search, I discovered the following command which will start the initialization process from scratch:

/usr/local/openvpn_as/bin/ovpn-init --force

That also failed.  But I thought perhaps I wasn't paying attention the first time around and it was worth a shot.  At that point, I realized, this is just an account, the default is 'openvpn'.  Using the following command, I reset the account and I was admin to login through the web UI:

passwd openvpn

Running the above, as most anyone with a Unix background would know, will allow you to change the password for the account.