How can I define TypeScript types for NextAuth.js?

How can I define TypeScript types for NextAuth.js?

You can define TypeScript types for NextAuth.js by creating a custom type definition file. This allows you to specify the shape of the session and user objects.

Can you show me an example of a type definition?

Sure! Here's a simple example:

import NextAuth from 'next-auth';

declare module 'next-auth' {
  interface Session {
    user: {
      id: string;
      name: string;
      email: string;
    };
  }
}

What if I want to add custom fields to the user object?

You can extend the user interface in the same way. Just add your custom fields to the user object in the type definition.

Thanks! This is really helpful.

You're welcome! If you have any more questions about TypeScript or NextAuth.js, feel free to ask!