php - Getting unauthorized client from Twinfield API

one text

i am using the https://github.com/php-twinfield/twinfield library for interacting with the Twinfield API. However, i have not been able to get past authentication.

My API information: screenshot

My code:

$provider    = new \PhpTwinfield\Secure\Provider\OAuthProvider([
    'clientId'     => '{THE CLIENT ID FROM THE SCREENSHOT}',
    'clientSecret' => '{THE CLIENT SECRET FROM THE SCREENSHOT}',
    'redirectUri'  => 'https://blubwebsites.nl'
]);
$accessToken  = $provider->getAccessToken("authorization_code", ["code" => '{TOKEN GENERATED BY https://login.twinfield.com/auth/authentication/connect/authorize}']);
$refreshToken = $accessToken->getRefreshToken();

$connection  = new \PhpTwinfield\Secure\OpenIdConnectAuthentication($provider, $refreshToken);

However, when i try this code. I get the error unauthorized_client. I have no idea where this is coming from and why this is happening. Can anybody help me?

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