Connect to a vpn

Hello !
It has been a few days i’ve been trying to find a way to connect to a vpn with my ionic app.
There is no topic or plugin existing, except the android vpnservice class in java and the
NEVPNManager in swift.
How to access those classes ? Or do you know a working way to connect to a vpn ?
Thanks
PS: help me to get over this problem with cordova please