How can I extend the Authenticable contract for custom user authentication

1. Create a Custom User Model:
- Create a new model class that implements the `Authenticatable` contract, for example, `App\Models\CustomUser.php`.
- Implement the required methods defined in the `Authenticatable` contract, such as `getAuthIdentifierName()`, `getAuthIdentifier()`, `getAuthPassword()`, etc.

Example:

php
   namespace App\Models;

   use Illuminate\Foundation\Auth\User as Authenticatable;
   use Illuminate\Notifications\Notifiable;

   class CustomUser extends Authenticatable
   {
       use Notifiable;

       protected $fillable = [
           'name', 'email', 'password',
       ];

       protected $hidden = [
           'password', 'remember_token',
       ];

       public function getAuthIdentifierName()
       {
           return 'id';
       }

       public function getAuthIdentifier()
       {
           return $this->getKey();
       }

       public function getAuthPassword()
       {
           return $this->password;
       }

       // Implement other required Authenticatable methods...
   }
   

2. Configure the Authentication Provider:
- In the `config/auth.php` file, update the `providers` configuration to use your custom user model.

Example:

php
   'providers' => [
       'users' => [
           'driver' => 'eloquent',
           'model' => App\Models\CustomUser::class,
       ],
   ],
   

3. Customize the Authentication Logic:
- If needed, you can customize the authentication logic by creating a custom Fortify action class.
- For example, you can create a custom `AttemptToAuthenticate` action that performs additional checks or validation before attempting to authenticate the user.

Example:

php
   namespace App\Actions\Fortify;

   use Illuminate\Http\Request;
   use Laravel\Fortify\Actions\AttemptToAuthenticate as FortifyAttemptToAuthenticate;

   class AttemptToAuthenticate extends FortifyAttemptToAuthenticate
   {
       public function handle(Request $request, $next)
       {
           // Perform custom authentication logic
           if ($this->isUserAllowedToLogin($request)) {
               return parent::handle($request, $next);
           }

           // Return a custom response or redirect if the user is not allowed to log in
           return response()->json(['error' => 'You are not allowed to log in.'], 403);
       }

       protected function isUserAllowedToLogin(Request $request)
       {
           // Implement your custom logic to check if the user is allowed to log in
           // For example, you could check a custom user attribute or a permission
           return true;
       }
   }
   

4. Update the Authentication Pipeline:
- In your `App\Providers\JetstreamServiceProvider`, update the `authenticateThrough()` method to use your custom `AttemptToAuthenticate` action.

Example:

php
   Fortify::authenticateThrough(function (Request $request) {
       return array_filter([
           config('fortify.limiters.login') ? null : EnsureLoginIsNotThrottled::class,
           RedirectIfTwoFactorAuthenticatable::class,
           AttemptToAuthenticate::class,
           PrepareAuthenticatedSession::class,
       ]);
   });
   

By following these steps, you can extend the Authenticable contract and use your custom user model for authentication in Laravel Jetstream. This allows you to integrate your own user authentication logic while still benefiting from the features and functionality provided by Jetstream and Fortify.

Remember to thoroughly test your custom authentication implementation to ensure that it works as expected and doesn't introduce any security vulnerabilities.