diff --git a/AuthService.cpp b/AuthService.cpp
new file mode 100644
index 0000000..291bc1a
--- /dev/null
+++ b/AuthService.cpp
@@ -0,0 +1,15 @@
+#include "AuthService.h"
+#include <iostream>
+
+User* AuthService::login(Database& db,
+                         const std::string& username,
+                         const std::string& password) {
+    auto users = db.getAllUsers();
+    for (auto user : users) {
+        if (user->getUsername() == username) {
+            return user;
+        }
+    }
+    std::cout << "Erreur : utilisateur introuvable.\n";
+    return nullptr;
+}
diff --git a/AuthService.h b/AuthService.h
new file mode 100644
index 0000000..4d65d81
--- /dev/null
+++ b/AuthService.h
@@ -0,0 +1,15 @@
+#ifndef AUTHSERVICE_H
+#define AUTHSERVICE_H
+
+#include "../database/Database.h"
+#include "../models/User.h"
+#include <string>
+
+class AuthService {
+public:
+    static User* login(Database& db,
+                       const std::string& username,
+                       const std::string& password);
+};
+
+#endif
\ No newline at end of file
diff --git a/ExportService.cpp b/ExportService.cpp
new file mode 100644
index 0000000..a476332
--- /dev/null
+++ b/ExportService.cpp
@@ -0,0 +1,35 @@
+#include "ExportService.h"
+#include <fstream>
+#include <iostream>
+
+void ExportService::exportData(User* user) {
+    if (user == nullptr) {
+        std::cout << "Erreur : utilisateur invalide.\n";
+        return;
+    }
+
+    std::ofstream file("export.txt");
+    if (!file.is_open()) {
+        std::cout << "Erreur lors de l'ouverture du fichier.\n";
+        return;
+    }
+
+    file << "===== EXPORT DES DONNEES =====\n";
+    file << "Utilisateur : " << user->getUsername() << "\n\n";
+
+    if (user->getRole() == Role::ADMIN) {
+        file << "ROLE : ADMIN\n";
+        file << "Accès complet aux étudiants, cours et notes.\n";
+    }
+    else if (user->getRole() == Role::PROF) {
+        file << "ROLE : PROF\n";
+        file << "Accès aux étudiants et modification des notes.\n";
+    }
+    else if (user->getRole() == Role::STUDENT) {
+        file << "ROLE : STUDENT\n";
+        file << "Accès uniquement à ses informations et notes.\n";
+    }
+
+    file.close();
+    std::cout << "Export terminé avec succès.\n";
+}
\ No newline at end of file
diff --git a/ExportService.h b/ExportService.h
new file mode 100644
index 0000000..4dc3c98
--- /dev/null
+++ b/ExportService.h
@@ -0,0 +1,11 @@
+#ifndef EXPORTSERVICE_H
+#define EXPORTSERVICE_H
+
+#include "../models/User.h"
+
+class ExportService {
+public:
+    static void exportData(User* user);
+};
+
+#endif
\ No newline at end of file