我用next-auth v4.22.1建立了一个NextJS v13.4.2项目，让用户通过使用“Login with Google”按钮进行身份验证。我目前也在使用next-auth Firebase适配器。当前文件配置为：
/app/(lib)/firestore.js：

import { initFirestore } from "@next-auth/firebase-adapter";
import { cert } from "firebase-admin/app";

export const firestore = initFirestore({
    credential: cert({
        projectId: process.env.FIREBASE_PROJECT_ID,
        clientEmail: process.env.FIREBASE_CLIENT_EMAIL,
        privateKey: process.env.FIREBASE_PRIVATE_KEY,
    }),
});

/app/(lib)/auth.js：

import GoogleProvider from "next-auth/providers/google";
import { FirestoreAdapter } from "@next-auth/firebase-adapter";
import { firestore } from "@lib/firestore";

export const authOptions = {
    providers: [
        GoogleProvider({
            clientId: process.env.GOOGLE_ID,
            clientSecret: process.env.GOOGLE_SECRET,
        }),
    ],
    adapter: FirestoreAdapter(firestore),
};

/app/api/auth/[...nextauth]/route.js：

import NextAuth from "next-auth";
import { authOptions } from "@lib/auth";

const handler = NextAuth(authOptions);

export { handler as GET, handler as POST };

现在，所有这些工作都很好，但我想做的是从我的Firestore数据库中查询一些数据并将其显示到页面中。所以，我想我可以这样做：

import { firestore } from "@lib/firestore";
import { collection, getDocs } from "firebase/firestore";

const citiesCol = collection(firestore, "cities");
const citiesSnapshot = await getDocs(citiesCol);
const citiesList = citiesSnapshot.docs.map((doc) => doc.data());

但不幸的是，我犯了一个错误：Expected first argument to collection() to be a CollectionReference, a DocumentReference or FirebaseFirestore
所以，我的问题是，我可以重用我导出的firestore对象（来自/app/(lib)/firestore.js）来处理下一个认证逻辑，以获取一些数据吗？或者我需要创建一个不同的firebase配置并重新初始化Firestore？