Please review the following points and comment below if everything is configured correctly:

Set up guards in config/auth.php for Passport Ensure you have configured the guards for Passport in the config/auth.php file. Refer to the example below:

'api' => [
    'driver' => 'passport', /** For Passport */
    'provider' => 'users2',
],

Set up providers in config/auth.php for Passport Configure the providers in the config/auth.php file for Passport. Here's an example:
```
'users2' => [
    'driver' => 'eloquent',
    'model' => env('AUTH_MODEL', App\Models\User::class),
],
```
Generate Passport keys Ensure the Passport keys are generated in the following paths:
- storage/oauth-private.key
- storage/oauth-public.key
Assign the appropriate permissions to these files, such as 600.
Manually generate keys if not created automatically If the keys are not generated automatically, you can forcefully generate them using the following command:
```
php artisan passport:keys --force
```
Load Passport keys in the AppServiceProvider In the boot method of app/Providers/AppServiceProvider.php, load the Passport keys as shown below:
```
public function boot(): void
{
    Passport::loadKeysFrom(base_path('storage'));
}
```
Clear cache and restart the application After completing the above steps, clear the cache using:
```
php artisan optimize:clear
```
Then, restart your Laravel application.

If you encounter any issues after these configurations, feel free to comment below. I’ll be happy to assist you!

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