I send my code here :

 private function createJwtToken()
{
$configuration = Configuration::forSymmetricSigner(

    // You may use any HMAC variations (256, 384, and 512)

    new Signer\Rsa\Sha256(),

    // replace the value below with a key of your own!

    InMemory::plainText(env('GITHUB_APPS_SECRET_KEY', ''))

    // You may also override the JOSE encoder/decoder if needed by providing extra arguments here

);

$now   = new DateTimeImmutable();

$token = $configuration->builder(new MyClaimsFormatter())

    ->issuedBy(env('GITHUB_APPS_ID', 0))

    ->issuedAt($now)

    ->expiresAt($now->modify('+10 minute'))

    ->getToken($configuration->signer(), $configuration->signingKey());

info($token->toString());

return $token->toString();

}
private function getAccessToken(Client $http, $jwtToken)
{
//get access token

return $http->request('POST', 'app/installations/INSTALLATIONS_ID/access_tokens', [

    'headers' => [

        'Accept' => 'application/json',

        'Authorization' => 'Bearer ' . $jwtToken

    ]

]);

}

Like to see your answers😁

thanks bro. thats really helpful