/home/kueuepay/public_html/vendor/league/oauth1-client/src/Signature/PlainTextSignature.php
<?php

namespace League\OAuth1\Client\Signature;

class PlainTextSignature extends Signature implements SignatureInterface
{
    /**
     * @inheritDoc
     */
    public function method()
    {
        return 'PLAINTEXT';
    }

    /**
     * @inheritDoc
     */
    public function sign($uri, array $parameters = [], $method = 'POST')
    {
        return $this->key();
    }
}
Error Handling

Error Handling

In case of an error, the API will return an error response containing a specific error code 400, 403 Failed and a user-friendly message. Refer to our API documentation for a comprehensive list of error codes and their descriptions.