export default NextAuth({   providers: [     // ...some probiders   ],   callbacks: {     async signIn({ user, account, profile, email, credentials }){       // You cannot use spread syntax       // user = {...[Your variable]}       user.[Your variable] = {         // ...some properties       }     },     async jwt({ token, user }){       // You cannot use spread syntax       // token = {...user.[Your variable]}       token.[Your variable] = user.[Your variable]     },     async session({ session, token }){       // You cannot use spread syntax       // session = {...token.[Your variable]}       session.[Your variable] = token.[Your variable]     }   } })