code refactor and added audit time log for tables.

src/main/java/com/java/vls/employee/portal/controller/AuthController.java

@@ -13,14 +13,18 @@
 @RequestMapping("/auth")
 public class AuthController {
 
-    @Autowired
-    private AuthenticationManager authenticationManager;
+    private final AuthenticationManager authenticationManager;
 
-    @Autowired
-    private JwtUtil jwtUtil;
 
-    @Autowired
-    private UserService userService;
+    private final JwtUtil jwtUtil;
+
+    private final UserService userService;
+
+    public AuthController(AuthenticationManager authenticationManager, JwtUtil jwtUtil, UserService userService){
+        this.authenticationManager = authenticationManager;
+        this.jwtUtil = jwtUtil;
+        this.userService = userService;
+    }
 
     @PostMapping("/login")
     public String login(@RequestParam("username") String username, @RequestParam("password") String password) throws Exception {

src/main/java/com/java/vls/employee/portal/entity/User.java

@@ -1,16 +1,23 @@
 package com.java.vls.employee.portal.entity;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.Getter;
 import lombok.Setter;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
+import org.springframework.data.annotation.CreatedDate;
 
 import javax.persistence.*;
+import java.time.LocalDateTime;
 import java.util.HashSet;
 import java.util.Set;
 
 @Entity
 @Table(name = "users")
 @Getter
 @Setter
+@JsonInclude(JsonInclude.Include.NON_NULL)
 public class User {
 
     @Id
@@ -34,14 +41,25 @@ public class User {
     )
     private Set<Role> roles = new HashSet<>();
 
+    private transient String role;
+
+    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
+    @CreationTimestamp
+    private LocalDateTime createdDate;
+
+    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
+    @UpdateTimestamp
+    private LocalDateTime updatedDate;
+
     // Constructors, Getters, and Setters
 
     public User() {}
 
-    public User(String username, String password, String email) {
+    public User(String username, String password, String email,String role) {
         this.username = username;
         this.password = password;
         this.email = email;
+        this.role = role;
     }
 
     // Getters and setters...

src/main/java/com/java/vls/employee/portal/jwt/JwtRequestFilter.java

@@ -18,12 +18,14 @@
 @Component
 public class JwtRequestFilter extends OncePerRequestFilter {
 
-    @Autowired
-    private JwtUtil jwtUtil; // Your JWT utility class
+    private final JwtUtil jwtUtil; // Your JWT utility class
 
-    @Autowired
-    private UserDetailsService userDetailsService; // Ensure this is your CustomUserDetailsService
+    private final UserDetailsService userDetailsService; // Ensure this is your CustomUserDetailsService
 
+    public  JwtRequestFilter(JwtUtil jwtUtil,UserDetailsService userDetailsService) {
+        this.jwtUtil = jwtUtil;
+        this.userDetailsService = userDetailsService;
+    }
     @Override
     protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
             throws ServletException, IOException {

src/main/java/com/java/vls/employee/portal/jwt/JwtUtil.java

@@ -22,8 +22,6 @@ public class JwtUtil {
 
     private static final long EXPIRATION_TIME = 864_000_000; // 10 days
 
-    private static final SecretKey KEY = Keys.secretKeyFor(SignatureAlgorithm.HS256);
-
     // Constructor to initialize the secret key
     public JwtUtil(@Value("${jwt.secret}") String secret) {
         byte[] decodedKey = Base64.getDecoder().decode(secret);

src/main/java/com/java/vls/employee/portal/service/CustomUserDetailsService.java

@@ -21,6 +21,7 @@ public class CustomUserDetailsService implements UserDetailsService {
     @Override
     public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
         User user = userRepository.findByUsername(username);
+
         if (user == null) {
             throw new UsernameNotFoundException("User not found: " + username);
         }

src/main/java/com/java/vls/employee/portal/service/UserService.java

@@ -28,7 +28,7 @@ public UserService(UserRepository userRepository, RoleRepository roleRepository,
     @Transactional
     public User registerUser(User user) {
         user.setPassword(passwordEncoder.encode(user.getPassword()));
-        Role userRole = roleRepository.findByName("ROLE_USER"); // or any role
+        Role userRole = roleRepository.findByName(user.getRole()); // or any role
         user.setRoles(new HashSet<>(Set.of(userRole)));
         return userRepository.save(user);
     }

src/test/java/com/java/vls/employee/portal/entity/UserTest.java

@@ -11,7 +11,7 @@ class UserTest {
 
     @BeforeEach
     void setUp() {
-        userUnderTest = new User("username", "password", "email");
+        userUnderTest = new User("username", "password", "email","");
     }
 
     @Test