reorder file structure

Frontend/lib/mih_objects/app_user.dart

@@ -1,35 +0,0 @@
-// ignore: file_names
-class AppUser {
-  final int idUser;
-  final String email;
-  final String fname;
-  final String lname;
-  final String type;
-  final String app_id;
-  final String username;
-  final String pro_pic_path;
-
-  const AppUser(
-    this.idUser,
-    this.email,
-    this.fname,
-    this.lname,
-    this.type,
-    this.app_id,
-    this.username,
-    this.pro_pic_path,
-  );
-
-  factory AppUser.fromJson(dynamic json) {
-    return AppUser(
-      json['idUser'],
-      json['email'],
-      json['fname'],
-      json['lname'],
-      json['type'],
-      json['app_id'],
-      json['username'],
-      json['pro_pic_path'],
-    );
-  }
-}