Node.js Nodejs+；Firebase身份验证

我已经在我的node js passport应用程序中添加了firebase身份验证，以便更轻松地使用Google登录，以下脚本仅允许用户在经过身份验证的情况下访问仪表板页面，但无法使用Google身份验证，有人能帮我吗

 const firebase = require("firebase/app");
 require("firebase/auth");

 const firebaseConfig = {
 apiKey: "x",
 authDomain: "x",
 databaseURL: "x",
 projectId: "x",
 storageBucket: "x",
 messagingSenderId: "x",
 appId: "x",
 measurementId: "x"
};
firebase.initializeApp(firebaseConfig);

  module.exports = {
  ensureAuthenticated: function(req, res, next) {
    firebase.auth().onAuthStateChanged(user => { 
    if(req.isAuthenticated()){
        return next();
    } else if (user) {
        return next();
    } else {
    req.flash('error_msg', 'Please log in to  view this page');
    res.redirect('/users/login')
    }})}}