Method: tunedModels.list returns 400 Bad Request when Query Parameter is passed

[derrickobedgiu1]

Hello, listing tuned models returns 400 Bad Request when I pass the optional query parameters with documentation at: https://ai.google.dev/api/rest/v1beta/tunedModels/list
All other tuning end points, including listing the tuned models without parameters work fine but not with parameters passed.

Successful:

$request = $gemini->listTunedModels();

print_r($request);

400 Bad Request:

$request = $gemini->listTunedModels([
    'page_size' => 20,
    'filter' => 'owner:me'
]);

print_r($request);

The Code:

public function listTunedModels(?array $params = null): string
    {
        if (!$this->accountCredentialStatus) {
            throw new \Exception('Service or OAuth 2.0 Credential required to list tuned models');
        }

        $url = Url::tunedModelsUrl();
        if (!is_null($params)) {
            $response = $this->client->get($url, [
                'headers' => [
                    'Content-Type' => 'application/json',
                    'x-goog-user-project' => $this->projectid,
                    'Authorization' => 'Bearer ' . $this->getAccessToken(),
                ],
                'json' => $params
            ]);

        } else {
            $response = $this->client->get($url, [
                'headers' => [
                    'Content-Type' => 'application/json',
                    'x-goog-user-project' => $this->projectid,
                    'Authorization' => 'Bearer ' . $this->getAccessToken(),
                ]
            ]);
        }

        return $response->getBody()->getContents();
    }

Is there another way of passing the parameters? Because this is the only endpoint so far failing (passing the paramters)