Add all files

app/Admin/Resources/OauthClientResource/Pages/CreateOauthClient.php

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+<?php
+
+namespace App\Admin\Resources\OauthClientResource\Pages;
+
+use App\Admin\Resources\OauthClientResource;
+use Filament\Resources\Pages\CreateRecord;
+use Illuminate\Database\Eloquent\Model;
+use Laravel\Passport\ClientRepository;
+use Laravel\Passport\Passport;
+use phpseclib3\Crypt\RSA;
+
+class CreateOauthClient extends CreateRecord
+{
+    protected static string $resource = OauthClientResource::class;
+
+    protected function handleRecordCreation(array $data): Model
+    {
+        [$publicKey, $privateKey] = [
+            Passport::keyPath('oauth-public.key'),
+            Passport::keyPath('oauth-private.key'),
+        ];
+        // Do the encryption keys exist?
+        // Read storage/oauth-private.key and storage/oauth-public.key
+        if (!file_exists($publicKey) && !file_exists($privateKey)) {
+            $key = RSA::createKey(4096);
+
+            file_put_contents($publicKey, (string) $key->getPublicKey());
+            file_put_contents($privateKey, (string) $key);
+
+            if (!windows_os()) {
+                chmod($publicKey, 0660);
+                chmod($privateKey, 0600);
+            }
+        }
+
+        $clientRepository = new ClientRepository;
+        $record = $clientRepository->create(null, $data['name'], $data['redirect']);
+
+        return $record;
+    }
+}

app/Admin/Resources/OauthClientResource/Pages/EditOauthClient.php

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+<?php
+
+namespace App\Admin\Resources\OauthClientResource\Pages;
+
+use App\Admin\Resources\OauthClientResource;
+use Filament\Actions;
+use Filament\Resources\Pages\EditRecord;
+
+class EditOauthClient extends EditRecord
+{
+    protected static string $resource = OauthClientResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Actions\DeleteAction::make(),
+        ];
+    }
+}

app/Admin/Resources/OauthClientResource/Pages/ListOauthClients.php

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+<?php
+
+namespace App\Admin\Resources\OauthClientResource\Pages;
+
+use App\Admin\Resources\OauthClientResource;
+use Filament\Actions;
+use Filament\Resources\Pages\ListRecords;
+
+class ListOauthClients extends ListRecords
+{
+    protected static string $resource = OauthClientResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Actions\CreateAction::make(),
+        ];
+    }
+}