Why Next-auth Session Not Containing the user data(like email, name etc) after Login

[EasyCodingTutorial]

#Here is my Code

import ConnectToDb from "@/Lib/ConnectToDb";
import User from "@/Models/User";
import NextAuth from "next-auth/next";
import CredentialsProvider from "next-auth/providers/credentials";
import bcrypt from 'bcryptjs';
import { NextAuthOptions } from "next-auth";

interface AuthProps {
Email: string,
Password: string,
}

export const authOptions: NextAuthOptions = {
providers: [
CredentialsProvider({
name: "credentials",
credentials: {},
async authorize(credentials) {
const { Email, Password } = credentials as AuthProps;

            try {
                await ConnectToDb();
                const user = await User.findOne({ Email });
                console.log(user);
                if (!user) {
                    return null;
                }

                const isValidPassword = await bcrypt.compare(Password, user.Password);
                if (!isValidPassword) {
                    return null;
                }

                return user;

            } catch (error) {
                console.error("Authorization error:", error);
                return null;
            }
        }
    })
],
session: {
    strategy: "jwt",
},
secret: process.env.NEXTAUTH_SECRET,
pages: {
    signIn: "/"
}

};

const handler = NextAuth(authOptions);
export { handler as GET, handler as POST };

[EasyCodingTutorial]

Firstly, I am not sure why I am encountering this error. I did everything correctly. However, when I looked closely, I realized that you need to specifically return the data like this:

return { id: user._id.toString(), name: user.name, email: user.email };
This worked for me.