@Override
    public void shutdown() {
        injector.getInstance(SSOAuthenticationProviderService.class).shutdown();
    }
Returns the Guice injector available for use by this implementation of
SSOAuthenticationProvider. The returned injector has already been
configured with all modules supplied at the time this
SSOAuthenticationProvider was created.

@return
    The Guice injector available for use by this implementation of
    SSOAuthenticationProvider.
extensions/guacamole-auth-sso/modules/guacamole-auth-sso-base/src/main/java/org/apache/guacamole/auth/sso/SSOAuthenticationProvider.java