private function processUrl($url)
    {
        $vars = [
            '{CLIENT_ID}'    => $this->getClientId(),
            '{REDIRECT_URI}' => $this->getRedirectURI(),
            '{SCOPE}'        => $this->getScope(),
            '{STATE}'        => $this->getState(),
            " "              => '',
            "\n"             => '',
            "\r"             => '',
            "\t"             => ''
        ];

        $url = str_replace(array_keys($vars), array_values($vars), $url);

        return $url;
    }