Added Auth0 resource 

This way it could look like:
```php

    protected function configureOptions(OptionsResolverInterface $resolver)
    {
        parent::configureOptions($resolver);

        $resolver->setDefaults(array(
            'authorization_url' => '{base_url}/authorize',
            'access_token_url'  => '{base_url}/oauth/token',
            'infos_url'         => '{base_url}/userinfo',
        ));

        $resolver->setRequired(array(
            'domain',
        ));

        $normalizer = function (Options $options, $value) {
            return str_replace('{domain}', $options['domain'], $value);
        };

        $resolver->setNormalizers(array(
            'authorization_url' => $normalizer,
            'access_token_url'  => $normalizer,
            'infos_url'         => $normalizer,
        ));
    }