<?php
require_once('/path/to/DocSpring/vendor/autoload.php');

<?php
require_once(__DIR__ . '/vendor/autoload.php');



// Configure HTTP basic authorization: api_token_basic
$config = DocSpring\Configuration::getDefaultConfiguration()
              ->setUsername('YOUR_USERNAME')
              ->setPassword('YOUR_PASSWORD');


$apiInstance = new DocSpring\Api\Client(
    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
    // This is optional, `GuzzleHttp\Client` will be used as default.
    new GuzzleHttp\Client(),
    $config
);
$template_id = tpl_1234567890abcdef02; // string
$data = new \DocSpring\Model\AddFieldsData(); // \DocSpring\Model\AddFieldsData

try {
    $result = $apiInstance->addFieldsToTemplate($template_id, $data);
    print_r($result);
} catch (Exception $e) {
    echo 'Exception when calling Client->addFieldsToTemplate: ', $e->getMessage(), PHP_EOL;
}