Create code_verifier in OB2

Questions
1

I’m looking for a way to generate a code_verifier from an api.

I think I managed to find the js code to do that.

My question is: how to implement this code in OB2.

Thanks for the help, guys!

Dr = function() {
    var e = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_~.",
        t = "";
    return Array.from(zr().getRandomValues(new Uint8Array(43))).forEach((function(n) {
        return t += e[n % e.length]
    })), t
}


zr = function() {
    return window.crypto || window.msCrypto
}
2

Use NodeJS found in the Scripts block in OB2