我如何使用凭证访问令牌获取github电子邮件地址

Question

我正在尝试使用凭据accessToken获取电子邮件地址。有人知道怎么做吗？或我可以追踪的任何资源？

var provider = new firebase.auth.GithubAuthProvider();
            provider.addScope('repo');
            provider.setCustomParameters({
                'allow_signup': 'false'
            });

            firebase.auth().signInWithPopup(provider).then(function(result) {
                // This gives you a GitHub Access Token. You can use it to access the GitHub API.
                var token = result.credential.accessToken;
                // The signed-in user info.
                var user = result.user;
                // ...

                console.log("token = " + token);


            })