How to get userinfo in springboot using keycloak?

Question

I was able to get the username by using:

@Autowired
 private HttpServletRequest request;
 Principal user = request.getUserPrincipal();
 mqMessage.setUserName(user.getName());

But I want to get the firstName & lastName of the user logged in. How can i get the ff. userinfo using SpringBoot keycloak adapter?