Disable firebase accounts that use a disposable email

newuserCreated.js

const functions = require("firebase-functions");
const admin = require("firebase-admin");
const got = require("got");
const {
  dnsLookupIpVersionToFamily,
} = require("got/dist/source/core/utils/dns-ip-version");

const runtimeOpts = {
  timeoutSeconds: 10,
  memory: "256MB",
};

const checkDisposableEmail = async (email) => {
  try {
    const response = await got(
      `https://disposable.debounce.io/?email=${email}`,
      {
        headers: {
          "user-agent": "website.com", //I think debounce.io requires this
        },
        retry: 2,
        timeout: 3000,
      }
    ).json();
    const boolValue = response.disposable == "true"; //result contains boolean string
    return boolValue; // returns true (if disposable email) or false
  } catch (error) {
    functions.logger.error("checkDisposableEmail error", error);
    return false; // return false if error, so no false positives
  }
};

//Create new user firestore document - cloud functions
exports.newUserCreated = functions
  .runWith(runtimeOpts)
  .auth.user()
  .onCreate(async (event) => {
    // If user signed up with mobile number
    if (!event.email) {
      // Skip else block
    } else {
      // Check if disposable email
      const disposable = await checkDisposableEmail(event.email);
      if (disposable) {
        functions.logger.log(
          "newUserCreated: disposable email used. Disabled ",
          event.email,
          { uid: event.uid }
        );
        // Set user Auth to disabled.
        await admin.auth().updateUser(event.uid, {
          disabled: true,
        });
      }
    }
  });