Asus Router RT-AC68U - stock firmare - Please help setup PIA VPN within my router

Hello Everyone,

I am new to this forum but have been referred here by a helpful friend from Slickdeals.
My router is an Asus RT-AC68U with the latest stock firmware.

I have tried to setup my PIA account for VPN access from my router but am now stuck.
I have also gone to tech support at PIA with no success.

Please help me figure this out.
Regards,
John