mitmproxy/test/wg-test-client/test.conf

{
    "server_key": "EG47ZWjYjr+Y97TQ1A7sVl7Xn3mMWDnvjU/VxU769ls=",
    "client_key": "qG8b7LI/s+ezngWpXqj5A7Nj988hbGL+eQ8ePki0iHk="
}