code: @Override
    public void afterPropertiesSet() throws Exception {
      Assert.notNull(this.sessionManager, "Property 'sessionManager' must be assigned");
      Assert.notNull(this.authnContextService, "Property 'authnContextService' must be assigned");
      Assert.notNull(this.signSupportService, "Property 'signSupportService' must be assigned");
      Assert.notNull(this.attributeToIdMapping, "Property 'attributeToIdMapping' must be assigned");
      Assert.notNull(this.flowName, "Property 'flowName' must be assigned");
    }
docs: {@inheritDoc}