func WithTransport(transport http.RoundTripper) Option {
	return func(p *KeycloakProvider) {
		p.client = http.Client{
			Transport: transport,
		}
	}
}

// WithOpenIDConfig provide OpenID Endpoint configuration discovery document
func WithOpenIDConfig(oeConfig DiscoveryDoc) Option {
	return func(p *KeycloakProvider) {
		p.oeConfig = oeConfig
	}
}

// WithAdminURL provide admin URL configuration for Keycloak

	var err error
	switch vendor {
	case keyCloakVendor:
		adminURL := cfgGet(KeyCloakAdminURL)
		realm := cfgGet(KeyCloakRealm)
		p.provider, err = provider.KeyCloak(
			provider.WithAdminURL(adminURL),
			provider.WithOpenIDConfig(provider.DiscoveryDoc(p.DiscoveryDoc)),
			provider.WithTransport(transport),
			provider.WithRealm(realm),
		)
		return err
	default:
		return fmt.Errorf("Unsupported vendor %s", keyCloakVendor)
	}
}