diff --git a/covas_mobile/lib/main.dart b/covas_mobile/lib/main.dart
index cba45c4..46cf42b 100644
--- a/covas_mobile/lib/main.dart
+++ b/covas_mobile/lib/main.dart
@@ -25,18 +25,30 @@ class LoginDemo extends StatefulWidget {
 }
 
 class _LoginDemoState extends State<LoginDemo> {
-  Future<void> _login() async {
+  TextEditingController inputPseudo = TextEditingController();
+  TextEditingController inputPassword = TextEditingController();
+  Future<void> _login(BuildContext context) async {
     var url = Uri.parse("http://localhost:8083/api/token");
-    String credentials = "peter93:toto";
-    Codec<String, String> stringToBase64 = utf8.fuse(base64);
-    String encoded = stringToBase64.encode(credentials);
-    var response = await http.get(url, headers: {
-      HttpHeaders.authorizationHeader: 'Basic $encoded',
-    });
+    var pseudo = inputPseudo.text;
+    var password = inputPassword.text;
+    if ((pseudo.isNotEmpty) && (password.isNotEmpty)) {
+      String credentials = "${pseudo}:${password}";
+      Codec<String, String> stringToBase64 = utf8.fuse(base64);
+      String encoded = stringToBase64.encode(credentials);
+      var response = await http.get(url, headers: {
+        HttpHeaders.authorizationHeader: 'Basic $encoded',
+      });
 
-    if ((response.statusCode == 200) || (response.statusCode == 201)) {
-      Navigator.push(context,
-          MaterialPageRoute(builder: (_) => MyHomePage(title: 'Flutter Demo')));
+      if ((response.statusCode == 200) || (response.statusCode == 201)) {
+        Navigator.push(
+            context,
+            MaterialPageRoute(
+                builder: (_) => MyHomePage(title: 'Flutter Demo')));
+      } else {
+        showErrorDialog(context, "Probleme d'authentification");
+      }
+    } else {
+      showErrorDialog(context, "Champ vide");
     }
   }
 
@@ -66,6 +78,7 @@ class _LoginDemoState extends State<LoginDemo> {
               //padding: const EdgeInsets.only(left:15.0,right: 15.0,top:0,bottom: 0),
               padding: EdgeInsets.symmetric(horizontal: 15),
               child: TextField(
+                controller: inputPseudo,
                 decoration: InputDecoration(
                     border: OutlineInputBorder(),
                     labelText: 'Email',
@@ -77,6 +90,7 @@ class _LoginDemoState extends State<LoginDemo> {
                   left: 15.0, right: 15.0, top: 15, bottom: 0),
               //padding: EdgeInsets.symmetric(horizontal: 15),
               child: TextField(
+                controller: inputPassword,
                 obscureText: true,
                 decoration: InputDecoration(
                     border: OutlineInputBorder(),
@@ -100,7 +114,7 @@ class _LoginDemoState extends State<LoginDemo> {
                   color: Colors.blue, borderRadius: BorderRadius.circular(20)),
               child: FlatButton(
                 onPressed: () {
-                  _login();
+                  _login(context);
                 },
                 child: Text(
                   'Login',
@@ -117,4 +131,31 @@ class _LoginDemoState extends State<LoginDemo> {
       ),
     );
   }
+
+  showErrorDialog(BuildContext context, String text) {
+    // Create AlertDialog
+    AlertDialog dialog = AlertDialog(
+      title: Text("Error"),
+      content: Text(text),
+      actions: [
+        ElevatedButton(
+            child: Text("OK"),
+            style: ElevatedButton.styleFrom(
+                primary: Colors.red,
+                padding: EdgeInsets.symmetric(horizontal: 50, vertical: 20),
+                textStyle:
+                    TextStyle(fontSize: 15, fontWeight: FontWeight.normal)),
+            onPressed: () {
+              Navigator.of(context).pop("Yes, Of course!"); // Return value
+            }),
+      ],
+    );
+
+    // Call showDialog function to show dialog.
+    Future futureValue = showDialog(
+        context: context,
+        builder: (BuildContext context) {
+          return dialog;
+        });
+  }
 }