public function getResourceOwnerDetailsUrl(AccessToken $token)
    {
        $authorizedUser = $this->getAuthorizedUser($token);

        $params = [
            'token' => $token->getToken(),
            'user'  => $authorizedUser->getId()
        ];

        return 'https://slack.com/api/users.info?'.http_build_query($params);
    }