diff --git a/helpapp-backend/manage-services.sh b/helpapp-backend/manage-services.sh
new file mode 100755
index 0000000..0d0f4e6
--- /dev/null
+++ b/helpapp-backend/manage-services.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# List of services
+services=("user-service" "request-service" "volunteer-service" "feedback-service" "administration-service")
+
+# Function to start services
+start_services() {
+  for service in "${services[@]}"; do
+    echo "Starting $service..."
+    mvn spring-boot:run -pl $service &
+  done
+}
+
+# Function to stop services
+stop_services() {
+  echo "Stopping all services..."
+  pkill -f 'mvn spring-boot:run'
+  for port in {8080..8085}; do
+    echo "Killing process on port $port..."
+    fuser -k $port/tcp
+  done
+}
+
+# Check command line arguments
+if [ "$1" == "start" ]; then
+  start_services
+elif [ "$1" == "stop" ]; then
+  stop_services
+else
+  echo "Usage: $0 {start|stop}"
+fi
\ No newline at end of file
diff --git a/helpapp-backend/user-service/src/main/java/insa/application/helpapp/rest/UserServiceApplication.java b/helpapp-backend/user-service/src/main/java/insa/application/helpapp/rest/UserServiceApplication.java
index e28966f..8169b18 100644
--- a/helpapp-backend/user-service/src/main/java/insa/application/helpapp/rest/UserServiceApplication.java
+++ b/helpapp-backend/user-service/src/main/java/insa/application/helpapp/rest/UserServiceApplication.java
@@ -2,8 +2,8 @@ package insa.application.helpapp.rest;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.web.bind.annotation.*;
 import org.springframework.context.annotation.Bean;
+import org.springframework.web.bind.annotation.*;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
@@ -55,12 +55,12 @@ public class UserServiceApplication {
 
     // Authenticate a user
     @PostMapping("/authenticate")
-    public String authenticate(@RequestParam String email, @RequestParam String password) {
+    public AuthResponse authenticate(@RequestBody AuthRequest authRequest) {
         return userDatabase.values().stream()
-                .filter(user -> user.getEmail().equals(email) && user.getPassword().equals(password))
+                .filter(user -> user.getEmail().equals(authRequest.getEmail()) && user.getPassword().equals(authRequest.getPassword()))
                 .findFirst()
-                .map(user -> "Authentication successful for user ID: " + user.getId())
-                .orElse("Authentication failed");
+                .map(user -> new AuthResponse(user.getId(), "Authentication successful", true))
+                .orElse(new AuthResponse(null, "Authentication failed", false));
     }
 
     // Update user details (excluding password)
@@ -90,6 +90,52 @@ public class UserServiceApplication {
         return "User deleted successfully";
     }
 
+    // Data transfer objects
+    static class AuthRequest {
+        private String email;
+        private String password;
+
+        public String getEmail() {
+            return email;
+        }
+
+        public void setEmail(String email) {
+            this.email = email;
+        }
+
+        public String getPassword() {
+            return password;
+        }
+
+        public void setPassword(String password) {
+            this.password = password;
+        }
+    }
+
+    static class AuthResponse {
+        private Long userId;
+        private String message;
+        private boolean success;
+
+        public AuthResponse(Long userId, String message, boolean success) {
+            this.userId = userId;
+            this.message = message;
+            this.success = success;
+        }
+
+        public Long getUserId() {
+            return userId;
+        }
+
+        public String getMessage() {
+            return message;
+        }
+
+        public boolean isSuccess() {
+            return success;
+        }
+    }
+
     // User entity
     static class User {
         private Long id;
@@ -98,7 +144,6 @@ public class UserServiceApplication {
         private String password;
         private String role; // REQUESTER, VOLUNTEER, ADMIN
 
-        // Getters and setters
         public Long getId() {
             return id;
         }
diff --git a/helpapp-frontend/index.html b/helpapp-frontend/index.html
index 77e6dcb..693981f 100644
--- a/helpapp-frontend/index.html
+++ b/helpapp-frontend/index.html
@@ -4,61 +4,22 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>HelpApp</title>
-  <style>
-    body {
-      font-family: Arial, sans-serif;
-      margin: 0;
-      padding: 0;
-      background-color: #f9f9f9;
-    }
-    header {
-      background-color: #4CAF50;
-      color: white;
-      text-align: center;
-      padding: 1rem 0;
-    }
-    main {
-      padding: 2rem;
-    }
-    section {
-      margin-bottom: 2rem;
-      padding: 1rem;
-      border: 1px solid #ccc;
-      border-radius: 5px;
-      background-color: white;
-    }
-    section h2 {
-      margin-top: 0;
-    }
-    form {
-      display: flex;
-      flex-direction: column;
-    }
-    form input, form textarea, form select, form button {
-      margin-bottom: 1rem;
-      padding: 0.5rem;
-      font-size: 1rem;
-    }
-    button {
-      background-color: #4CAF50;
-      color: white;
-      border: none;
-      cursor: pointer;
-    }
-    button:hover {
-      background-color: #45a049;
-    }
-    .response {
-      margin-top: 1rem;
-      color: #555;
-    }
-  </style>
 </head>
 <body>
   <header>
     <h1>HelpApp</h1>
   </header>
   <main>
+    <section id="user-login">
+      <h2>Connexion</h2>
+      <form id="login-form">
+        <input type="email" id="login-email" placeholder="Email" required>
+        <input type="password" id="login-password" placeholder="Mot de passe" required>
+        <button type="submit">Se connecter</button>
+      </form>
+      <div class="response" id="login-response"></div>
+    </section>
+
     <section id="user-registration">
       <h2>Créer un compte utilisateur</h2>
       <form id="register-form">
@@ -83,14 +44,69 @@
       </form>
       <div class="response" id="request-response"></div>
     </section>
-
-    <section id="view-requests">
-      <h2>Voir les demandes d'aide</h2>
-      <button id="fetch-requests">Afficher les demandes</button>
-      <ul id="request-list"></ul>
-    </section>
   </main>
 
-  <script src="script.js"></script>
+  <script>
+    const API_BASE = "http://localhost";
+
+    document.addEventListener("DOMContentLoaded", () => {
+      const loginForm = document.getElementById("login-form");
+      const loginResponse = document.getElementById("login-response");
+      const registerForm = document.getElementById("register-form");
+      const registerResponse = document.getElementById("register-response");
+      const userRegistrationSection = document.getElementById("user-registration");
+
+      // Check if user is logged in
+      if (localStorage.getItem("userId")) {
+        userRegistrationSection.style.display = "none";
+      }
+
+      // User Login
+      loginForm.addEventListener("submit", async (e) => {
+        e.preventDefault();
+        const email = document.getElementById("login-email").value;
+        const password = document.getElementById("login-password").value;
+
+        try {
+          const response = await fetch(`${API_BASE}:8083/users/authenticate`, {
+            method: "POST",
+            headers: { "Content-Type": "application/json" },
+            body: JSON.stringify({ email, password }),
+          });
+          const result = await response.json();
+          if (result.success) {
+            localStorage.setItem("userId", result.userId);
+            loginResponse.textContent = `Connexion réussie : ID ${result.userId}`;
+            userRegistrationSection.style.display = "none";
+          } else {
+            loginResponse.textContent = `Échec de la connexion : ${result.message}`;
+          }
+        } catch (error) {
+          loginResponse.textContent = "Erreur lors de la connexion.";
+        }
+      });
+
+      // User Registration
+      registerForm.addEventListener("submit", async (e) => {
+        e.preventDefault();
+        const name = document.getElementById("name").value;
+        const email = document.getElementById("email").value;
+        const password = document.getElementById("password").value;
+        const role = document.getElementById("role").value;
+
+        try {
+          const response = await fetch(`${API_BASE}:8083/users`, {
+            method: "POST",
+            headers: { "Content-Type": "application/json" },
+            body: JSON.stringify({ name, email, password, role }),
+          });
+          const result = await response.json();
+          registerResponse.textContent = `Utilisateur créé : ID ${result.id}`;
+        } catch (error) {
+          registerResponse.textContent = "Erreur lors de la création de l'utilisateur.";
+        }
+      });
+    });
+  </script>
 </body>
 </html>
diff --git a/helpapp-frontend/script.js b/helpapp-frontend/script.js
deleted file mode 100644
index 2da4fbf..0000000
--- a/helpapp-frontend/script.js
+++ /dev/null
@@ -1,69 +0,0 @@
-const API_BASE = "http://localhost";
-
-document.addEventListener("DOMContentLoaded", () => {
-  // User Registration
-  const registerForm = document.getElementById("register-form");
-  const registerResponse = document.getElementById("register-response");
-
-  registerForm.addEventListener("submit", async (e) => {
-    e.preventDefault();
-    const name = document.getElementById("name").value;
-    const email = document.getElementById("email").value;
-    const password = document.getElementById("password").value;
-    const role = document.getElementById("role").value;
-
-    try {
-      const response = await fetch(`${API_BASE}:8083/users`, {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ name, email, password, role }),
-      });
-      const result = await response.json();
-      registerResponse.textContent = `Utilisateur créé : ID ${result.id}`;
-    } catch (error) {
-      registerResponse.textContent = "Erreur lors de la création de l'utilisateur.";
-    }
-  });
-
-  // Create Help Request
-  const requestForm = document.getElementById("request-form");
-  const requestResponse = document.getElementById("request-response");
-
-  requestForm.addEventListener("submit", async (e) => {
-    e.preventDefault();
-    const userId = document.getElementById("user-id").value;
-    const details = document.getElementById("details").value;
-
-    try {
-      const response = await fetch(`${API_BASE}:8082/requests`, {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ userId, details }),
-      });
-      const result = await response.json();
-      requestResponse.textContent = `Demande créée : ID ${result.id}`;
-    } catch (error) {
-      requestResponse.textContent = "Erreur lors de la création de la demande.";
-    }
-  });
-
-  // Fetch Help Requests
-  const fetchRequestsButton = document.getElementById("fetch-requests");
-  const requestList = document.getElementById("request-list");
-
-  fetchRequestsButton.addEventListener("click", async () => {
-    try {
-      const response = await fetch(`${API_BASE}:8082/requests`);
-      const requests = await response.json();
-
-      requestList.innerHTML = ""; // Clear existing list
-      requests.forEach((req) => {
-        const li = document.createElement("li");
-        li.textContent = `ID: ${req.id}, Détails: ${req.details}, Statut: ${req.status}`;
-        requestList.appendChild(li);
-      });
-    } catch (error) {
-      requestList.innerHTML = "<li>Erreur lors de la récupération des demandes.</li>";
-    }
-  });
-});