PhP/ Symfony 404 error Not Found returned for "https://api.openai.com/v1/completions"

Hello everyone, regular user of chatGPT and young web developer, I started to do a small personal project
around this in PHP/Symfony, with the purpose of calling the api in my project.

Unfortunately, I get a 404 Not Found returned for "https://api.openai.com/v1/completions error when calling the api.

Here is my controller:

class HomeController extends AbstractController
{

    #[Route('/', name: 'home')]
    public function home(Request $request, \App\Service\OpenAiService $openAi): Response
    {
        $form = $this->createForm(RegexType::class);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $data = $form->getData();
            $json = $openAi->getResponse($data['regex']);
            dd($json);
        }

        return $this->render('home/index.html.twig', [
            'form' => $form,
        ]);


    }
}

Here is my OpenAiService.php:

class OpenAiService
{
    public function __construct (
        private HttpClientInterface $client, private ParameterBagInterface $para
    ){

    }
    public function getResponse(string $regex): string
    {
        $open_ai_key = $this->para->get('OPENAI_API_KEY');

        $response = $this->client->request(
            'POST',
            'https://api.openai.com/v1/completions',
            [
                'headers' => [
                    'Content-Type' => 'application/json'
                ],
                'json' => [
                    'model' =>'test-davinci-002',
                    'prompt' => 'Salut chat GPT',
                    'temperature' => 0,
                    'max_tokens' => 1024,
                    'frequency_penality' => 0.5,
                    'presence_penality' => 0,
                ],
                'auth_bearer' => $open_ai_key,
            ]
        );
        $respense_array = $response->toArray() ?? [];
        switch ($response->getStatusCode()){
            case 200:
                return n12br($respense_array['choices'][0]['text']);
                break;

            default:
                    return  'Bad request';
                    break;
        }
    }

}

The api key being stored in a .env.local, this one is good because when I change it, I get a 403 error.

Anyone got a lead for me?

Thanks in advance for reading me.

PS. sorry for my bad English

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