我正在使用firebase和nextjs制作一个应用程序，当我登录并尝试获取当前用户时，我创建了一个登录页面。这个问题开始于我几天前在react native中也是第一次它保持状态，在firebase从9.2.0更新到10.0.0之后，用户没有保持状态。
Nextjs代码：
AuthConext.js:

import React from "react";
import { onAuthStateChanged, getAuth } from "firebase/auth";
import firebase_app from "@/firebase/config";

const auth = getAuth(firebase_app);

export const AuthContext = React.createContext({});

export const useAuthContext = () => React.useContext(AuthContext);

export const AuthContextProvider = ({ children }) => {
  const [user, setUser] = React.useState(null);
  const [loading, setLoading] = React.useState(true);

  React.useEffect(() => {
    const unsubscribe = onAuthStateChanged(auth, (user) => {
      if (user) {
        console.log("user change");
        setUser(user);
      } else {
        setUser(null);
      }
      setLoading(false);
    });

    return () => unsubscribe();
  }, []);

  return (
    <AuthContext.Provider value={{ user }}>
      {loading ? <div>Loading...</div> : children}
    </AuthContext.Provider>
  );
};

字符串
Login.js（查看评论）：

const { user } = useAuthContext();   // Gives Current User
  
  async function handleSignIn() {
    if (password && email) {
      const { result, error } = await signIn(email, password); // signin with email function rest is   handled in an other file where the signin with Email Passowrd fucntion is called
      
      console.log(user);    // Giving undefined
      if (error) {
        setErrorStop(error);
      } else {
        router.push("/blog");  // Tried on /blog page too the same AuthContext but still un defined
      }
    }
  }

型
有些人可能会说，用户可能需要时间来初始化，我尝试了它在一个单独的页面，但它仍然给未定义。