@Override
        public String getName() { return "saml-callback-url"; }
The callback URL to use for SAML IdP, normally the base
of the Guacamole install. The SAML extensions callback
endpoint will be appended to this value.
extensions/guacamole-auth-sso/modules/guacamole-auth-sso-saml/src/main/java/org/apache/guacamole/auth/saml/conf/ConfigurationService.java