How can I implement custom callbacks in NextAuth for authentication?

How can I implement custom callbacks in NextAuth for authentication?

To implement custom callbacks in NextAuth, you can define them in the NextAuth options. For example, you can customize the sign-in callback to add additional logic.

Can you show me a code example for a custom sign-in callback?

Sure! Here's a simple example:

callbacks: {
  async signIn(user, account, profile) {
    // Custom logic here
    return true; // Return true to allow sign-in
  }
}

What other callbacks can I customize in NextAuth?

You can customize several callbacks, including redirect, session, and jwt. Each serves a different purpose in the authentication flow.

How do I test my custom callbacks?

You can test your custom callbacks by simulating authentication flows in your application and checking the behavior of your defined logic.