src/Http.php
public function setCookieFile($file) {
        $file = (string)$file;
        return $this->setOption(CURLOPT_COOKIEJAR, $file)
            ->setOption(CURLOPT_COOKIEFILE, $file);
    }
public function setCookieFile($file) {
        $file = (string)$file;
        return $this->setOption(CURLOPT_COOKIEJAR, $file)
            ->setOption(CURLOPT_COOKIEFILE, $file);
    }
SET COOKIE FILE
@param string|File $file
@return $this