Mailchimp在我使用cyclic.sh部署的Node.js/Express应用程序中使用注册表单时不断撤销/禁用我的API密钥。我从mailchimp收到一封邮件，说我的API密钥被公开发布在网上，因为我在GITHUB上托管我的代码，并且存储库是公开的。那么，我如何解决这个问题并阻止我的API密钥被禁用？我是不是应该加密我的密钥什么的？

const express = require("express");
const bodyParser = require("body-parser");
const request = require("request");

const https = require("https");

const { response } = require("express");

const app = express();

app.use(express.static("public"));
app.use(bodyParser.urlencoded({ extended: true }));

app.get("/", function (req, res) {
    res.sendFile(__dirname + "/signup.html");
});

app.post("/", function (req, res) {
    const firstName = req.body.fName;
    const lastName = req.body.lName;
    const email = req.body.email;

    const data = {
        members: [
            {
                email_address: email,
                status: "subscribed",
                merge_fields: {
                    FNAME: firstName,
                    LNAME: lastName
                },
            }
        ]
    }
    const jsonData = JSON.stringify(data);
    const url = "https://****.api.mailchimp.com/3.0/lists/**********"
    const options = {
        method: "POST",
        auth: "ch****s1:cf3b3175*********************be29-****"
    }

    const request = https.request(url, options, function (response) {
        var statCode = response.statusCode;
        if (statCode === 200) {
            res.sendFile(__dirname + "/success.html");
        }
        else {
            res.sendFile(__dirname + "/failure.html");
        }

        response.on("data", function (data) {
            console.log(JSON.parse(data));

        });
    });
    request.write(jsonData);
    request.end();
});

app.post("/failure", function (req, res) {
    res.redirect("/");
});

app.listen(process.env.PORT || 3000, function () {
    console.log("server is running on port 3000.");
});