diff --git a/.manus/db/db-query-1763737221512.json b/.manus/db/db-query-1763737221512.json
new file mode 100644
index 0000000..a01382f
--- /dev/null
+++ b/.manus/db/db-query-1763737221512.json
@@ -0,0 +1,9 @@
+{
+  "query": "ALTER TABLE users ADD COLUMN username VARCHAR(100) AFTER email",
+  "command": "mysql --batch --raw --column-names --default-character-set=utf8mb4 --host gateway02.us-east-1.prod.aws.tidbcloud.com --port 4000 --user 4CrrYuB5tme73Qo.root --database 7PAT67UmWoxv8vwp8Bbcv6 --execute ALTER TABLE users ADD COLUMN username VARCHAR(100) AFTER email",
+  "rows": [],
+  "messages": [],
+  "stdout": "",
+  "stderr": "",
+  "execution_time_ms": 507
+}
\ No newline at end of file
diff --git a/.manus/db/db-query-1763737229123.json b/.manus/db/db-query-1763737229123.json
new file mode 100644
index 0000000..6f096aa
--- /dev/null
+++ b/.manus/db/db-query-1763737229123.json
@@ -0,0 +1,9 @@
+{
+  "query": "ALTER TABLE users ADD UNIQUE KEY unique_username (username)",
+  "command": "mysql --batch --raw --column-names --default-character-set=utf8mb4 --host gateway02.us-east-1.prod.aws.tidbcloud.com --port 4000 --user 4CrrYuB5tme73Qo.root --database 7PAT67UmWoxv8vwp8Bbcv6 --execute ALTER TABLE users ADD UNIQUE KEY unique_username (username)",
+  "rows": [],
+  "messages": [],
+  "stdout": "",
+  "stderr": "",
+  "execution_time_ms": 575
+}
\ No newline at end of file
diff --git a/.manus/db/db-query-error-1763737207540.json b/.manus/db/db-query-error-1763737207540.json
new file mode 100644
index 0000000..efdb146
--- /dev/null
+++ b/.manus/db/db-query-error-1763737207540.json
@@ -0,0 +1,8 @@
+{
+  "query": "ALTER TABLE users ADD COLUMN username VARCHAR(100) UNIQUE AFTER email",
+  "command": "mysql --batch --raw --column-names --default-character-set=utf8mb4 --host gateway02.us-east-1.prod.aws.tidbcloud.com --port 4000 --user 4CrrYuB5tme73Qo.root --database 7PAT67UmWoxv8vwp8Bbcv6 --execute ALTER TABLE users ADD COLUMN username VARCHAR(100) UNIQUE AFTER email",
+  "returncode": 1,
+  "logs": [
+    "ERROR 8200 (HY000) at line 1: unsupported add column 'username' constraint UNIQUE KEY when altering '7PAT67UmWoxv8vwp8Bbcv6.users'"
+  ]
+}
\ No newline at end of file
diff --git a/client/src/pages/AdminUsers.tsx b/client/src/pages/AdminUsers.tsx
index 835b53f..fb0b1a0 100644
--- a/client/src/pages/AdminUsers.tsx
+++ b/client/src/pages/AdminUsers.tsx
@@ -44,11 +44,15 @@ export default function AdminUsers() {
     openId: "",
     name: "",
     email: "",
+    username: "",
+    password: "",
     role: "user" as "user" | "admin",
   });
   const [editForm, setEditForm] = useState({
     name: "",
     email: "",
+    username: "",
+    password: "",
     role: "user" as "user" | "admin",
   });
 
@@ -63,6 +67,8 @@ export default function AdminUsers() {
         openId: "",
         name: "",
         email: "",
+        username: "",
+        password: "",
         role: "user",
       });
     },
@@ -127,6 +133,8 @@ export default function AdminUsers() {
       openId: createForm.openId,
       name: createForm.name || undefined,
       email: createForm.email || undefined,
+      username: createForm.username || undefined,
+      password: createForm.password || undefined,
       role: createForm.role,
       isActive: true,
     });
@@ -137,6 +145,8 @@ export default function AdminUsers() {
     setEditForm({
       name: user.name || "",
       email: user.email || "",
+      username: user.username || "",
+      password: "", // Toujours vide pour la sécurité
       role: user.role,
     });
     setEditDialogOpen(true);
@@ -145,12 +155,23 @@ export default function AdminUsers() {
   const handleSaveEdit = () => {
     if (!selectedUser) return;
 
-    updateMutation.mutate({
+    // Ne pas envoyer username et password s'ils sont vides
+    const updateData: any = {
       id: selectedUser.id,
       name: editForm.name || undefined,
       email: editForm.email || undefined,
       role: editForm.role,
-    });
+    };
+    
+    if (editForm.username) {
+      updateData.username = editForm.username;
+    }
+    
+    if (editForm.password) {
+      updateData.password = editForm.password;
+    }
+    
+    updateMutation.mutate(updateData);
   };
 
   const handleToggleStatus = (user: any) => {
@@ -281,6 +302,7 @@ export default function AdminUsers() {
               <TableHead>ID</TableHead>
               <TableHead>Nom</TableHead>
               <TableHead>Email</TableHead>
+              <TableHead>Identifiant</TableHead>
               <TableHead>Rôle</TableHead>
               <TableHead>Statut</TableHead>
               <TableHead>Dernière connexion</TableHead>
@@ -291,7 +313,7 @@ export default function AdminUsers() {
           <TableBody>
             {filteredUsers.length === 0 ? (
               <TableRow>
-                <TableCell colSpan={8} className="text-center py-8 text-muted-foreground">
+                <TableCell colSpan={9} className="text-center py-8 text-muted-foreground">
                   Aucun utilisateur trouvé
                 </TableCell>
               </TableRow>
@@ -301,6 +323,7 @@ export default function AdminUsers() {
                   <TableCell className="font-medium">{user.id}</TableCell>
                   <TableCell>{user.name || "N/A"}</TableCell>
                   <TableCell>{user.email || "N/A"}</TableCell>
+                  <TableCell>{user.username || "N/A"}</TableCell>
                   <TableCell>
                     <Badge variant={user.role === "admin" ? "default" : "secondary"}>
                       {user.role === "admin" ? "Administrateur" : "Utilisateur"}
@@ -403,6 +426,27 @@ export default function AdminUsers() {
               />
             </div>
 
+            <div>
+              <Label htmlFor="createUsername">Identifiant de connexion</Label>
+              <Input
+                id="createUsername"
+                value={createForm.username}
+                onChange={(e) => setCreateForm({ ...createForm, username: e.target.value })}
+                placeholder="Identifiant unique pour la connexion"
+              />
+            </div>
+
+            <div>
+              <Label htmlFor="createPassword">Mot de passe</Label>
+              <Input
+                id="createPassword"
+                type="password"
+                value={createForm.password}
+                onChange={(e) => setCreateForm({ ...createForm, password: e.target.value })}
+                placeholder="Minimum 6 caractères"
+              />
+            </div>
+
             <div>
               <Label htmlFor="createRole">Rôle</Label>
               <Select
@@ -465,6 +509,29 @@ export default function AdminUsers() {
               />
             </div>
 
+            <div>
+              <Label htmlFor="editUsername">Identifiant de connexion</Label>
+              <Input
+                id="editUsername"
+                value={editForm.username}
+                onChange={(e) => setEditForm({ ...editForm, username: e.target.value })}
+                placeholder="Identifiant unique pour la connexion"
+              />
+              <p className="text-xs text-muted-foreground mt-1">Laissez vide pour ne pas modifier</p>
+            </div>
+
+            <div>
+              <Label htmlFor="editPassword">Nouveau mot de passe</Label>
+              <Input
+                id="editPassword"
+                type="password"
+                value={editForm.password}
+                onChange={(e) => setEditForm({ ...editForm, password: e.target.value })}
+                placeholder="Laissez vide pour ne pas modifier"
+              />
+              <p className="text-xs text-muted-foreground mt-1">Minimum 6 caractères si modifié</p>
+            </div>
+
             <div>
               <Label htmlFor="editRole">Rôle</Label>
               <Select
diff --git a/drizzle/0012_dapper_ronan.sql b/drizzle/0012_dapper_ronan.sql
new file mode 100644
index 0000000..9e97fd1
--- /dev/null
+++ b/drizzle/0012_dapper_ronan.sql
@@ -0,0 +1,3 @@
+ALTER TABLE `users` ADD `username` varchar(100);--> statement-breakpoint
+ALTER TABLE `users` ADD `password` varchar(255);--> statement-breakpoint
+ALTER TABLE `users` ADD CONSTRAINT `users_username_unique` UNIQUE(`username`);
\ No newline at end of file
diff --git a/drizzle/meta/0012_snapshot.json b/drizzle/meta/0012_snapshot.json
new file mode 100644
index 0000000..3499879
--- /dev/null
+++ b/drizzle/meta/0012_snapshot.json
@@ -0,0 +1,854 @@
+{
+  "version": "5",
+  "dialect": "mysql",
+  "id": "95760afb-5e4d-4e32-afc6-fbbcec28c208",
+  "prevId": "443cedd2-fcbf-4247-a935-e69461bb7446",
+  "tables": {
+    "apprenants": {
+      "name": "apprenants",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "nom": {
+          "name": "nom",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "prenom": {
+          "name": "prenom",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "email": {
+          "name": "email",
+          "type": "varchar(320)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "codeEtablissement": {
+          "name": "codeEtablissement",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "fonction": {
+          "name": "fonction",
+          "type": "enum('directeur','chef_service','autre')",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "apprenants_id": {
+          "name": "apprenants_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {
+        "apprenants_email_unique": {
+          "name": "apprenants_email_unique",
+          "columns": [
+            "email"
+          ]
+        }
+      },
+      "checkConstraint": {}
+    },
+    "datesFormation": {
+      "name": "datesFormation",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "sequenceId": {
+          "name": "sequenceId",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "dateDebut": {
+          "name": "dateDebut",
+          "type": "datetime",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "dateFin": {
+          "name": "dateFin",
+          "type": "datetime",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "ordre": {
+          "name": "ordre",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "datesFormation_id": {
+          "name": "datesFormation_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {},
+      "checkConstraint": {}
+    },
+    "emailConfig": {
+      "name": "emailConfig",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "provider": {
+          "name": "provider",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'resend'"
+        },
+        "apiKey": {
+          "name": "apiKey",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "fromEmail": {
+          "name": "fromEmail",
+          "type": "varchar(320)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "fromName": {
+          "name": "fromName",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'Formation Manager Itinova'"
+        },
+        "mode": {
+          "name": "mode",
+          "type": "enum('simulation','production')",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'simulation'"
+        },
+        "domainVerified": {
+          "name": "domainVerified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "active": {
+          "name": "active",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "emailConfig_id": {
+          "name": "emailConfig_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {},
+      "checkConstraint": {}
+    },
+    "emailTemplates": {
+      "name": "emailTemplates",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "type": {
+          "name": "type",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "logoUrl": {
+          "name": "logoUrl",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "primaryColor": {
+          "name": "primaryColor",
+          "type": "varchar(7)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'#2563eb'"
+        },
+        "headerBgColor": {
+          "name": "headerBgColor",
+          "type": "varchar(7)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'#2563eb'"
+        },
+        "headerTextColor": {
+          "name": "headerTextColor",
+          "type": "varchar(7)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'#ffffff'"
+        },
+        "headerTitle": {
+          "name": "headerTitle",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'Formation Manager Itinova'"
+        },
+        "footerText": {
+          "name": "footerText",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "active": {
+          "name": "active",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "emailTemplates_id": {
+          "name": "emailTemplates_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {
+        "emailTemplates_type_unique": {
+          "name": "emailTemplates_type_unique",
+          "columns": [
+            "type"
+          ]
+        }
+      },
+      "checkConstraint": {}
+    },
+    "formateurs": {
+      "name": "formateurs",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "nom": {
+          "name": "nom",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "formateurs_id": {
+          "name": "formateurs_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {},
+      "checkConstraint": {}
+    },
+    "formations": {
+      "name": "formations",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "nom": {
+          "name": "nom",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "lienUnique": {
+          "name": "lienUnique",
+          "type": "varchar(100)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "actif": {
+          "name": "actif",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "formations_id": {
+          "name": "formations_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {
+        "formations_lienUnique_unique": {
+          "name": "formations_lienUnique_unique",
+          "columns": [
+            "lienUnique"
+          ]
+        }
+      },
+      "checkConstraint": {}
+    },
+    "inscriptions": {
+      "name": "inscriptions",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "apprenantId": {
+          "name": "apprenantId",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "sequenceId": {
+          "name": "sequenceId",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "statut": {
+          "name": "statut",
+          "type": "enum('confirmee','liste_attente','annulee')",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "dateInscription": {
+          "name": "dateInscription",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "inscriptions_id": {
+          "name": "inscriptions_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {},
+      "checkConstraint": {}
+    },
+    "passwordResetTokens": {
+      "name": "passwordResetTokens",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "userId": {
+          "name": "userId",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "token": {
+          "name": "token",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "expiresAt": {
+          "name": "expiresAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "used": {
+          "name": "used",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "passwordResetTokens_id": {
+          "name": "passwordResetTokens_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {
+        "passwordResetTokens_token_unique": {
+          "name": "passwordResetTokens_token_unique",
+          "columns": [
+            "token"
+          ]
+        }
+      },
+      "checkConstraint": {}
+    },
+    "sequences": {
+      "name": "sequences",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "formationId": {
+          "name": "formationId",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "nom": {
+          "name": "nom",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "lieu": {
+          "name": "lieu",
+          "type": "varchar(500)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "publicCible": {
+          "name": "publicCible",
+          "type": "enum('directeur','chef_service','autre')",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "formateurId": {
+          "name": "formateurId",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "capaciteMax": {
+          "name": "capaciteMax",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 12
+        },
+        "dateBlocage": {
+          "name": "dateBlocage",
+          "type": "datetime",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "statut": {
+          "name": "statut",
+          "type": "enum('ouverte','bloquee','terminee')",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'ouverte'"
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "sequences_id": {
+          "name": "sequences_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {},
+      "checkConstraint": {}
+    },
+    "users": {
+      "name": "users",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "int",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "openId": {
+          "name": "openId",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "email": {
+          "name": "email",
+          "type": "varchar(320)",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "username": {
+          "name": "username",
+          "type": "varchar(100)",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "password": {
+          "name": "password",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "loginMethod": {
+          "name": "loginMethod",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "role": {
+          "name": "role",
+          "type": "enum('user','admin')",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'user'"
+        },
+        "isActive": {
+          "name": "isActive",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "createdAt": {
+          "name": "createdAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        },
+        "updatedAt": {
+          "name": "updatedAt",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "onUpdate": true,
+          "default": "(now())"
+        },
+        "lastSignedIn": {
+          "name": "lastSignedIn",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "(now())"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {
+        "users_id": {
+          "name": "users_id",
+          "columns": [
+            "id"
+          ]
+        }
+      },
+      "uniqueConstraints": {
+        "users_openId_unique": {
+          "name": "users_openId_unique",
+          "columns": [
+            "openId"
+          ]
+        },
+        "users_username_unique": {
+          "name": "users_username_unique",
+          "columns": [
+            "username"
+          ]
+        }
+      },
+      "checkConstraint": {}
+    }
+  },
+  "views": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "tables": {},
+    "indexes": {}
+  }
+}
\ No newline at end of file
diff --git a/drizzle/meta/_journal.json b/drizzle/meta/_journal.json
index befeede..92e97f8 100644
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -85,6 +85,13 @@
       "when": 1763630439521,
       "tag": "0011_natural_cyclops",
       "breakpoints": true
+    },
+    {
+      "idx": 12,
+      "version": "5",
+      "when": 1763737191050,
+      "tag": "0012_dapper_ronan",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/drizzle/schema.ts b/drizzle/schema.ts
index 875088c..b3b33a8 100644
--- a/drizzle/schema.ts
+++ b/drizzle/schema.ts
@@ -15,6 +15,10 @@ export const users = mysqlTable("users", {
   openId: varchar("openId", { length: 64 }).notNull().unique(),
   name: text("name"),
   email: varchar("email", { length: 320 }),
+  /** Identifiant de connexion unique pour l'utilisateur */
+  username: varchar("username", { length: 100 }).unique(),
+  /** Mot de passe hashé (bcrypt) */
+  password: varchar("password", { length: 255 }),
   loginMethod: varchar("loginMethod", { length: 64 }),
   role: mysqlEnum("role", ["user", "admin"]).default("user").notNull(),
   /** Statut du compte (actif/inactif) */
diff --git a/package.json b/package.json
index e82644a..8ecc102 100644
--- a/package.json
+++ b/package.json
@@ -46,6 +46,7 @@
     "@trpc/react-query": "^11.6.0",
     "@trpc/server": "^11.6.0",
     "axios": "^1.12.0",
+    "bcryptjs": "^3.0.3",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
@@ -85,6 +86,7 @@
     "@builder.io/vite-plugin-jsx-loc": "^0.1.1",
     "@tailwindcss/typography": "^0.5.15",
     "@tailwindcss/vite": "^4.1.3",
+    "@types/bcryptjs": "^3.0.0",
     "@types/express": "4.17.21",
     "@types/google.maps": "^3.58.1",
     "@types/node": "^24.7.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 0308415..d4139b0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -115,6 +115,9 @@ importers:
       axios:
         specifier: ^1.12.0
         version: 1.12.2
+      bcryptjs:
+        specifier: ^3.0.3
+        version: 3.0.3
       class-variance-authority:
         specifier: ^0.7.1
         version: 0.7.1
@@ -227,6 +230,9 @@ importers:
       '@tailwindcss/vite':
         specifier: ^4.1.3
         version: 4.1.14(vite@7.1.9(@types/node@24.7.0)(jiti@2.6.1)(lightningcss@1.30.1)(tsx@4.20.6))
+      '@types/bcryptjs':
+        specifier: ^3.0.0
+        version: 3.0.0
       '@types/express':
         specifier: 4.17.21
         version: 4.17.21
@@ -2157,6 +2163,10 @@ packages:
   '@types/babel__traverse@7.28.0':
     resolution: {integrity: sha512-8PvcXf70gTDZBgt9ptxJ8elBeBjcLOAcOtoO/mPJjtji1+CdGbHgm77om1GrsPxsiE+uXIpNSK64UYaIwQXd4Q==}
 
+  '@types/bcryptjs@3.0.0':
+    resolution: {integrity: sha512-WRZOuCuaz8UcZZE4R5HXTco2goQSI2XxjGY3hbM/xDvwmqFWd4ivooImsMx65OKM6CtNKbnZ5YL+YwAwK7c1dg==}
+    deprecated: This is a stub types definition. bcryptjs provides its own type definitions, so you do not need this installed.
+
   '@types/body-parser@1.19.6':
     resolution: {integrity: sha512-HLFeCYgz89uk22N5Qg3dvGvsv46B8GLvKKo1zKG4NybA8U2DiEO3w9lqGg29t/tfLRJpJ6iQxnVw4OnB7MoM9g==}
 
@@ -2443,6 +2453,10 @@ packages:
     resolution: {integrity: sha512-vAPMQdnyKCBtkmQA6FMCBvU9qFIppS3nzyXnEM+Lo2IAhG4Mpjv9cCxMudhgV3YdNNJv6TNqXy97dfRVL2LmaQ==}
     hasBin: true
 
+  bcryptjs@3.0.3:
+    resolution: {integrity: sha512-GlF5wPWnSa/X5LKM1o0wz0suXIINz1iHRLvTS+sLyi7XPbe5ycmYI3DlZqVGZZtDgl4DmasFg7gOB3JYbphV5g==}
+    hasBin: true
+
   body-parser@1.20.3:
     resolution: {integrity: sha512-7rAxByjUMqQ3/bHJy7D6OGXvx/MMc4IqBn/X0fcM1QUcAItpZrBEYhWGem+tzXH90c+G01ypMcYJBO9Y30203g==}
     engines: {node: '>= 0.8', npm: 1.2.8000 || >= 1.4.16}
@@ -6641,6 +6655,10 @@ snapshots:
     dependencies:
       '@babel/types': 7.28.4
 
+  '@types/bcryptjs@3.0.0':
+    dependencies:
+      bcryptjs: 3.0.3
+
   '@types/body-parser@1.19.6':
     dependencies:
       '@types/connect': 3.4.38
@@ -6973,6 +6991,8 @@ snapshots:
 
   baseline-browser-mapping@2.8.12: {}
 
+  bcryptjs@3.0.3: {}
+
   body-parser@1.20.3:
     dependencies:
       bytes: 3.1.2
diff --git a/server/db.ts b/server/db.ts
index 5a6b619..11af9f6 100644
--- a/server/db.ts
+++ b/server/db.ts
@@ -418,6 +418,12 @@ export async function createUser(data: InsertUser) {
   const db = await getDb();
   if (!db) throw new Error("Database not available");
   
+  // Hasher le mot de passe si fourni
+  if (data.password) {
+    const bcrypt = await import('bcryptjs');
+    data.password = await bcrypt.hash(data.password, 10);
+  }
+  
   const result = await db.insert(users).values(data);
   return result;
 }
@@ -441,6 +447,12 @@ export async function updateUser(id: number, data: Partial<InsertUser>) {
   const db = await getDb();
   if (!db) throw new Error("Database not available");
   
+  // Hasher le mot de passe si fourni
+  if (data.password) {
+    const bcrypt = await import('bcryptjs');
+    data.password = await bcrypt.hash(data.password, 10);
+  }
+  
   await db.update(users).set(data).where(eq(users.id, id));
 }
 
diff --git a/server/routers.ts b/server/routers.ts
index 5a58084..b3cb9d4 100644
--- a/server/routers.ts
+++ b/server/routers.ts
@@ -618,6 +618,8 @@ export const appRouter = router({
       openId: z.string().min(1),
       name: z.string().optional(),
       email: z.string().email().optional(),
+      username: z.string().min(3).optional(),
+      password: z.string().min(6).optional(),
       role: z.enum(["user", "admin"]).default("user"),
       isActive: z.boolean().default(true),
     })).mutation(async ({ input }) => {
@@ -629,6 +631,8 @@ export const appRouter = router({
       id: z.number(),
       name: z.string().optional(),
       email: z.string().email().optional(),
+      username: z.string().min(3).optional(),
+      password: z.string().min(6).optional(),
       role: z.enum(["user", "admin"]).optional(),
       isActive: z.boolean().optional(),
     })).mutation(async ({ input }) => {
diff --git a/todo.md b/todo.md
index 2e326f7..cad8cd6 100644
--- a/todo.md
+++ b/todo.md
@@ -383,3 +383,12 @@
 - [x] Identifier la cause de la création excessive d'utilisateurs
 - [x] Corriger le problème
 - [x] Tester la correction
+
+## Identifiant de connexion et modification du mot de passe
+
+- [ ] Ajouter le champ username (identifiant de connexion) dans le schéma de la base de données
+- [ ] Générer et appliquer la migration de la base de données
+- [x] Mettre à jour les procédures tRPC pour gérer username et password
+- [ ] Afficher l'identifiant de connexion dans la liste des utilisateurs
+- [ ] Permettre la modification de l'identifiant et du mot de passe dans la fenêtre d'édition
+- [x] Tester les modifications