Modified code to reflect the code from the article

spring-security-client/spring-security-thymeleaf-authentication/src/main/java/org/baeldung/config/RegistrationController.java

@@ -30,7 +30,7 @@ public class RegistrationController {
     private static final Logger logger = LoggerFactory.getLogger(RegistrationController.class);
 
     @Autowired
-    AuthenticationManager authenticationManager;
+    private AuthenticationManager authenticationManager;
 
     /**
      * For demo purposes this need only be a GET request method
@@ -49,21 +49,19 @@ public String registerAndAuthenticate(HttpServletRequest request, HttpServletRes
         String username = "user";
         String password = "password";
 
-        String view = "registrationSuccess";
-
         if (requestQualifiesForManualAuthentication()) {
             try {
                 authenticate(username, password, request, response);
                 logger.debug("registerAndAuthenticate: authentication completed.");
             } catch (BadCredentialsException bce) {
                 logger.debug("Authentication failure: bad credentials");
                 bce.printStackTrace();
-                view = "systemError"; // assume a low-level error, since the registration
+                return "systemError"; // assume a low-level error, since the registration
                 // form would have been successfully validated
             }
         }
 
-        return view;
+        return "registrationSuccess";
     }
 
     private boolean requestQualifiesForManualAuthentication() {