Add get all users service.

src/main/java/com/stefan/security/auth/AuthenticationService.java

@@ -10,6 +10,8 @@
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
 
+import javax.ws.rs.NotFoundException;
+
 @Service
 @RequiredArgsConstructor
 public class AuthenticationService {

src/main/java/com/stefan/security/user/UserController.java

@@ -0,0 +1,20 @@
+package com.stefan.security.user;
+
+import lombok.AllArgsConstructor;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@AllArgsConstructor
+@Validated
+public class UserController {
+    private final UserService userService;
+
+    @GetMapping("/api/get-all-users")
+    public List<User> getAllUsers() {
+        return userService.getAllUsers();
+    }
+}

src/main/java/com/stefan/security/user/UserService.java

@@ -0,0 +1,9 @@
+package com.stefan.security.user;
+
+
+import java.util.List;
+
+public interface UserService {
+    List<User> getAllUsers();
+
+}

src/main/java/com/stefan/security/user/UserServiceImpl.java

@@ -0,0 +1,20 @@
+package com.stefan.security.user;
+
+import lombok.AllArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.validation.annotation.Validated;
+
+import java.util.List;
+
+@Service
+@AllArgsConstructor
+@Validated
+public class UserServiceImpl implements UserService {
+
+    private final UserRepository userRepository;
+
+    @Override
+    public List<User> getAllUsers() {
+        return userRepository.findAll();
+    }
+}