next-auth.d.ts

import NextAuth from 'next-auth';
import { TUserData } from './pages/api/auth/[...nextauth]';

declare module 'next-auth' {
  /**
   * Returned by `useSession`, `getSession` and received as a prop on the `SessionProvider` React Context
   */
  interface Session {
    user: TUserData;
  }
}