User panel fully functional

lib/models/user_definition.dart

@@ -0,0 +1,13 @@
+class UserDefinition {
+  final int id;
+  final String username;
+  final String password;
+  final String accessToken;
+
+  const UserDefinition({
+    required this.id,
+    required this.username,
+    required this.password,
+    required this.accessToken,
+  });
+}