Frontend first draft

frontend/pshared/lib/api/requests/change_password.dart

@@ -0,0 +1,18 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'change_password.g.dart';
+
+
+@JsonSerializable(explicitToJson: true)
+class ChangePassword {
+  @JsonKey(name: 'old')
+  final String oldPassword;
+  
+  @JsonKey(name: 'new')
+  final String newPassword;
+
+  const ChangePassword({required this.oldPassword, required this.newPassword});
+
+  factory ChangePassword.fromJson(Map<String, dynamic> json) => _$ChangePasswordFromJson(json);
+  Map<String, dynamic> toJson() => _$ChangePasswordToJson(this);
+}