Doesn’t work on my site

I added the code like this guide but it doesn’t work
https://fluentforms.com/docs/email-verification-with-truemail/

`add_filter(‘fluentform_validate_input_item_input_email’, function ($default, $field, $formData, $fields, $form) {

// You may change the following 3 lines
$targetFormId = 9;
$errorMessage = ‘Có v? nh? email b?n ch?a chính xác’; // You may change here
$trueMailApiKey = ‘xxx’;

if ($form->id != $targetFormId) {
return $default;
}

$fieldName = $field[‘name’];
if (empty($formData[$fieldName])) {
return $default;
}
$email = $formData[$fieldName];

$request = wp_remote_get(‘https://truemail.io/api/v1/verify/single?address_info=1&timeout=5&access_token=’.$trueMailApiKey.’&email=’.$email);

if(is_wp_error($request)) {
return $default; // request failed so we are skipping validation
}

$response = wp_remote_retrieve_body($request);

$response = json_decode($response, true);

if($response[‘result’] == ‘valid’) {
return $default;
}

return $errorMessage;

}, 10, 5);

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