diff --git a/src/main/java/fr/eni/demo/bll/LocationService.java b/src/main/java/fr/eni/demo/bll/LocationService.java
index f3e3093..33ac035 100644
--- a/src/main/java/fr/eni/demo/bll/LocationService.java
+++ b/src/main/java/fr/eni/demo/bll/LocationService.java
@@ -7,4 +7,5 @@ public interface LocationService {
   void add(Location location);
   void update(Location location);
   void updateDateEnd(String id, Location location);
+  Location findByCodeBarre(String codeBarre);
 }
diff --git a/src/main/java/fr/eni/demo/bll/UserService.java b/src/main/java/fr/eni/demo/bll/UserService.java
new file mode 100644
index 0000000..2482d21
--- /dev/null
+++ b/src/main/java/fr/eni/demo/bll/UserService.java
@@ -0,0 +1,11 @@
+package fr.eni.demo.bll;
+
+import fr.eni.demo.bo.User;
+import java.util.Optional;
+import java.util.List;
+
+public interface UserService {
+    void addUser(User user);
+    Optional<User> findByUsername(String username);
+    List<User> findAll();
+} 
\ No newline at end of file
diff --git a/src/main/java/fr/eni/demo/bll/UserServiceImpl.java b/src/main/java/fr/eni/demo/bll/UserServiceImpl.java
new file mode 100644
index 0000000..a977054
--- /dev/null
+++ b/src/main/java/fr/eni/demo/bll/UserServiceImpl.java
@@ -0,0 +1,39 @@
+package fr.eni.demo.bll;
+
+import fr.eni.demo.bo.User;
+import fr.eni.demo.dal.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class UserServiceImpl implements UserService {
+
+    private final UserRepository userRepository;
+    private final PasswordEncoder passwordEncoder;
+
+    @Autowired
+    public UserServiceImpl(UserRepository userRepository, PasswordEncoder passwordEncoder) {
+        this.userRepository = userRepository;
+        this.passwordEncoder = passwordEncoder;
+    }
+
+    @Override
+    public void addUser(User user) {
+        user.setPassword(passwordEncoder.encode(user.getPassword()));
+        userRepository.save(user);
+    }
+
+    @Override
+    public Optional<User> findByUsername(String username) {
+        return userRepository.findByUsername(username);
+    }
+
+    @Override
+    public List<User> findAll() {
+        return userRepository.findAll();
+    }
+} 
\ No newline at end of file
diff --git a/src/main/java/fr/eni/demo/bo/Location.java b/src/main/java/fr/eni/demo/bo/Location.java
index 6779a6f..ab8ce48 100644
--- a/src/main/java/fr/eni/demo/bo/Location.java
+++ b/src/main/java/fr/eni/demo/bo/Location.java
@@ -19,6 +19,9 @@ public class Location {
   @Id
   private String id;
 
+  @Field(name = "CODE_BARRE")
+  private String codeBarre;
+
   @Field(name = "LOCATION_START_DATE")
   private Date startDate;
 
diff --git a/src/main/java/fr/eni/demo/controller/LocationController.java b/src/main/java/fr/eni/demo/controller/LocationController.java
index 5fa2853..b9851ef 100644
--- a/src/main/java/fr/eni/demo/controller/LocationController.java
+++ b/src/main/java/fr/eni/demo/controller/LocationController.java
@@ -8,6 +8,7 @@ import org.springframework.web.bind.annotation.*;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.NoSuchElementException;
 
 @RestController
 @RequestMapping("/api/location")
@@ -23,6 +24,17 @@ public class LocationController {
         return buildResponse("Location added", true, new HashMap<>());
     }
 
+    // Chercher location depuis code barre
+    @GetMapping("/codeBarre/{codeBarre}")
+    public ResponseEntity<Map<String, Object>> findByCodeBarre(@PathVariable String codeBarre) {
+        try {
+            Location location = locationService.findByCodeBarre(codeBarre);
+            return buildResponse("Location trouvée", true, location);
+        } catch (NoSuchElementException e) {
+            return buildResponse(e.getMessage(), false, new HashMap<>());
+        }
+    }
+
     private ResponseEntity<Map<String, Object>> buildResponse(String message, boolean status, Object data) {
         Map<String, Object> response = new HashMap<>();
         response.put("message", message);
diff --git a/src/main/java/fr/eni/demo/controller/UserController.java b/src/main/java/fr/eni/demo/controller/UserController.java
new file mode 100644
index 0000000..fda549f
--- /dev/null
+++ b/src/main/java/fr/eni/demo/controller/UserController.java
@@ -0,0 +1,35 @@
+package fr.eni.demo.controller;
+
+import fr.eni.demo.bll.UserService;
+import fr.eni.demo.bo.User;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/users")
+@RequiredArgsConstructor
+public class UserController {
+
+    private final UserService userService;
+
+    @PostMapping
+    public ResponseEntity<User> createUser(@RequestBody User user) {
+        userService.addUser(user);
+        return ResponseEntity.ok(user);
+    }
+
+    @GetMapping
+    public ResponseEntity<List<User>> getAllUsers() {
+        return ResponseEntity.ok(userService.findAll());
+    }
+
+    @GetMapping("/{username}")
+    public ResponseEntity<User> getUserByUsername(@PathVariable String username) {
+        return userService.findByUsername(username)
+                .map(ResponseEntity::ok)
+                .orElse(ResponseEntity.notFound().build());
+    }
+} 
\ No newline at end of file
diff --git a/src/main/java/fr/eni/demo/dal/LocationRepository.java b/src/main/java/fr/eni/demo/dal/LocationRepository.java
index ddd580c..7f49dab 100644
--- a/src/main/java/fr/eni/demo/dal/LocationRepository.java
+++ b/src/main/java/fr/eni/demo/dal/LocationRepository.java
@@ -5,5 +5,8 @@ import org.springframework.data.mongodb.repository.MongoRepository;
 import org.springframework.stereotype.Repository;
 
 @Repository
-public interface LocationRepository extends MongoRepository<Location, Long> {
+public interface LocationRepository extends MongoRepository<Location, Integer> {
+
+    Optional<Location> findByCodeBarre(String codeBarre);
+
 }
diff --git a/src/main/java/fr/eni/demo/dal/UserRepository.java b/src/main/java/fr/eni/demo/dal/UserRepository.java
new file mode 100644
index 0000000..f077a77
--- /dev/null
+++ b/src/main/java/fr/eni/demo/dal/UserRepository.java
@@ -0,0 +1,12 @@
+package fr.eni.demo.dal;
+
+import fr.eni.demo.bo.User;
+import org.springframework.data.mongodb.repository.MongoRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+
+@Repository
+public interface UserRepository extends MongoRepository<User, String> {
+    Optional<User> findByUsername(String username);
+} 
\ No newline at end of file