raspap-webgui/config/vpn-providers.json

{
    "providers": [
        {
            "id": 1,
            "name": "ExpressVPN",
            "bin_path": "/usr/bin/expressvpn",
            "commands": "connect disconnect status version"
        },
        {
            "id": 2,
            "name": "NordVPN",
            "bin_path": "/usr/bin/nordvpn",
            "commands": "connect disconnect status version"
        }
    ]
}