public function createResource(
        $uri = "",
        $content = null,
        $headers = []
    ) {
        $options = ['http_errors' => false];

        // Set content.
        $options['body'] = $content;

        // Set headers.
        $options['headers'] = $headers;

        return $this->client->request(
            'POST',
            $uri,
            $options
        );
    }