javascript - firebase reauthenticateAndRetrieveDataWithCredential facebook 用户凭证

Question

我正在尝试编写一个函数来重新验证使用 Facebook 帐户登录的 Firebase 用户。对于电子邮件，我根据电子邮件和密码创建凭据，但 Facebook 不会为该用户存储密码。我试图在文档中找到它，但找不到

 let user = firebase.auth().currentUser;
 let credential = '';

    //User created with Email
    if(user.providerData[0].providerId === "password") {
      credential = firebase.auth.EmailAuthProvider.credential(
        user.email,
        this.state.password
      );
    }

   //User created with Facebook
   if(user.providerData[0].providerId === "facebook.com") {
      credential = firebase.auth.FacebookAuthProvider.credential(
         ? // <= User Email, Token 
       )
   } 
   user.reauthenticateAndRetrieveDataWithCredential(credential).then(function(){
         user.delete().then(function() {             
         }).catch(function(error) {
          console.log(error)
          }
      }).catch((error) => {
       console.log(error)
      }

Answer 1

根据 FacebookAuthProvider.credential() 签名，您将需要 OAuth token /accessToken 来创建凭据。

您可以在用户登录时提取accessToken:

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

该示例摘自 https://firebase.google.com/docs/auth/web/facebook-login您可以在其中找到更多相关信息。