how to configure the bingAiClient's proxy

[allentofight]

I configure my bingAiClient like this:

bingAiClient: {
        // Necessary for some people in different countries, e.g. China (https://cn.bing.com)
        host: 'https://cn.bing.com',
        // The "_U" cookie value from bing.com
        userToken: '',
        // If the above doesn't work, provide all your cookies as a string instead
        cookies: '',
        // A proxy string like "http://<ip>:<port>"
        proxy: '',
        // (Optional) Set to true to enable `console.debug()` logging
        debug: false,
    }

I use shadowsocks in my Mac, but I don't know how to configure the proxy