knowledge/src/auth-types.d.ts

import type { DefaultSession } from 'next-auth';

declare module 'next-auth' {
  interface Session {
    user: {
      id: string;
      groupIds: string[];
    } & DefaultSession['user'];
  }

  interface User {
    id: string;
  }
}

declare module 'next-auth/jwt' {
  interface JWT {
    userId?: string;
    groupIds?: string[];
  }
}