WIP still, tuning up auth and room wildcard with middleware

.gitignore

@@ -1,6 +1,7 @@
 ###
 # Dart
 ###
+
 # Files and directories created by pub
 **/.dart_tool/
 **/.packages
@@ -72,3 +73,6 @@ app.*.map.json
 
 **/llm-chat.md
 
+# DB files
+*.sqlite*
+

backend/.dart_frog/server.dart

@@ -0,0 +1,57 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint, implicit_dynamic_list_literal
+
+import 'dart:io';
+
+import 'package:dart_frog/dart_frog.dart';
+
+import '../main.dart' as entrypoint;
+import '../routes/index.dart' as index;
+import '../routes/create_room.dart' as create_room;
+import '../routes/room/[roomCode]/join.dart' as room_$room_code_join;
+import '../routes/auth/index.dart' as auth_index;
+
+import '../routes/_middleware.dart' as middleware;
+import '../routes/room/[roomCode]/_middleware.dart' as room_$room_code_middleware;
+
+void main() async {
+  final address = InternetAddress.tryParse('') ?? InternetAddress.anyIPv6;
+  final port = int.tryParse(Platform.environment['PORT'] ?? '8080') ?? 8080;
+  hotReload(() => createServer(address, port));
+}
+
+Future<HttpServer> createServer(InternetAddress address, int port) {
+  final handler = Cascade().add(buildRootHandler()).handler;
+  return entrypoint.run(handler, address, port);
+}
+
+Handler buildRootHandler() {
+  final pipeline = const Pipeline().addMiddleware(middleware.middleware);
+  final router = Router()
+    ..mount('/auth', (context) => buildAuthHandler()(context))
+    ..mount('/room/<roomCode>', (context,roomCode,) => buildRoom$roomCodeHandler(roomCode,)(context))
+    ..mount('/', (context) => buildHandler()(context));
+  return pipeline.addHandler(router);
+}
+
+Handler buildAuthHandler() {
+  final pipeline = const Pipeline();
+  final router = Router()
+    ..all('/', (context) => auth_index.onRequest(context,));
+  return pipeline.addHandler(router);
+}
+
+Handler buildRoom$roomCodeHandler(String roomCode,) {
+  final pipeline = const Pipeline().addMiddleware(room_$room_code_middleware.middleware);
+  final router = Router()
+    ..all('/join', (context) => room_$room_code_join.onRequest(context,roomCode,));
+  return pipeline.addHandler(router);
+}
+
+Handler buildHandler() {
+  final pipeline = const Pipeline();
+  final router = Router()
+    ..all('/', (context) => index.onRequest(context,))..all('/create_room', (context) => create_room.onRequest(context,));
+  return pipeline.addHandler(router);
+}
+

backend/drift/schemas/db/drift_schema_v1.json

@@ -0,0 +1 @@
+{"_meta":{"description":"This file contains a serialized version of schema entities for drift.","version":"1.2.0"},"options":{"store_date_time_values_as_text":false},"entities":[{"id":0,"references":[],"type":"table","data":{"name":"game_rooms","was_declared_in_moor":false,"columns":[{"name":"uuid","getter_name":"uuid","moor_type":"string","nullable":false,"customConstraints":null,"defaultConstraints":"UNIQUE","dialectAwareDefaultConstraints":{"sqlite":"UNIQUE"},"default_dart":null,"default_client_dart":null,"dsl_features":["unknown"]},{"name":"status","getter_name":"status","moor_type":"string","nullable":false,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[],"type_converter":{"dart_expr":"const EnumNameConverter<GameStatus>(GameStatus.values)","dart_type_name":"GameStatus"}},{"name":"code","getter_name":"code","moor_type":"string","nullable":false,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[{"allowed-lengths":{"min":6,"max":6}}]},{"name":"created_at","getter_name":"createdAt","moor_type":"dateTime","nullable":true,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]}],"is_virtual":false,"without_rowid":false,"constraints":[],"strict":true}},{"id":1,"references":[0],"type":"table","data":{"name":"users","was_declared_in_moor":false,"columns":[{"name":"uuid","getter_name":"uuid","moor_type":"string","nullable":false,"customConstraints":null,"defaultConstraints":"UNIQUE","dialectAwareDefaultConstraints":{"sqlite":"UNIQUE"},"default_dart":null,"default_client_dart":null,"dsl_features":["unknown"]},{"name":"game_room_uuid","getter_name":"gameRoomUuid","moor_type":"string","nullable":false,"customConstraints":null,"defaultConstraints":"REFERENCES game_rooms (uuid)","dialectAwareDefaultConstraints":{"sqlite":"REFERENCES game_rooms (uuid)"},"default_dart":null,"default_client_dart":null,"dsl_features":["unknown"]},{"name":"name","getter_name":"name","moor_type":"string","nullable":false,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[{"allowed-lengths":{"min":2,"max":32}}]},{"name":"created_at","getter_name":"createdAt","moor_type":"dateTime","nullable":true,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]}],"is_virtual":false,"without_rowid":false,"constraints":[],"strict":true}},{"id":2,"references":[0],"type":"index","data":{"on":0,"name":"idx_game_rooms_code","sql":"CREATE UNIQUE INDEX IF NOT EXISTS idx_game_rooms_code \nON game_rooms(code) \nWHERE status IN (\"opened\", \"running\");\n","unique":true,"columns":[]}}]}

backend/lib/authenticator.dart

@@ -3,27 +3,43 @@ import 'dart:io';
 import 'package:backend/database.dart';
 import 'package:backend/service/db_access.dart';
 import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
+import 'package:logging/logging.dart';
+import 'package:shared_models/user.dart';
 
 final jwtSecret = _getSecret();
+const expTimeSecs = 3600;
+
+final log = Logger('Authenticator');
+
+enum JWTTokenStatus {
+  valid,
+  expired,
+  invalid,
+}
 
 class Authenticator {
-  Future<String?> generateToken({required String username}) async {
+  Future<String?> generateToken(CreateUserRequest req) async {
-    final newUser = await Db.createUser(username: username);
+    final newUser = await Db.createUser(username: req.username, roomCode: req.roomCode);
     if (newUser == null) return null;
 
+    final iat = DateTime.now().millisecondsSinceEpoch ~/ 1000;
     final jwt = JWT(
       {
         'uid': newUser.uuid,
+        'roomUuid': newUser.gameRoomUuid,
+        'iat': iat,
+        'exp': iat + expTimeSecs,
       },
     );
 
     return jwt.sign(SecretKey(jwtSecret));
   }
 
-  Future<User?> verifyToken(
+  Future<(User?, JWTTokenStatus)> verifyToken(
     String token,
   ) async {
     try {
+      log.info('Verifying jwt: ${token.substring(0, 10)}...${token.substring(token.length - 10)}');
       final payload = JWT.verify(
         token,
         SecretKey(jwtSecret),
@@ -31,16 +47,47 @@ class Authenticator {
 
       final payloadData = payload.payload as Map<String, dynamic>;
 
+      final iat = payloadData['iat'] as int;
+      final exp = payloadData['exp'] as int;
+
+      if (iat + expTimeSecs != exp || DateTime.now().millisecondsSinceEpoch ~/ 1000 > exp) {
+        return (null, JWTTokenStatus.expired);
+      }
+
       final uuid = payloadData['uuid'] as String;
-      return await Db.getUser(uuid);
+      return (await Db.getUser(uuid), JWTTokenStatus.valid);
     } catch (e) {
-      return null;
+      return (null, JWTTokenStatus.invalid);
     }
   }
 }
 
+// load any env vars inside root of project's .env file, then looks for JWT_TOKEN_SECRET
 String _getSecret() {
-  final secret = Platform.environment['JWT_TOKEN_SECRET'];
+  final envs = {...Platform.environment};
+  try {
+    final result = Process.runSync('git', ['rev-parse', '--show-toplevel']);
+    if (result.exitCode != 0) {
+      log.warning('Failed to get git root directory: ${result.stderr}');
+      throw Exception('Failed to get git root directory');
+    }
+    final rootDir = (result.stdout as String).trim();
+    final envFile = File('$rootDir/.env');
+    if (envFile.existsSync()) {
+      for (final line in envFile.readAsLinesSync()) {
+        if (line.trim().isEmpty || line.startsWith('#')) continue;
+        final parts = line.split('=');
+        if (parts.length != 2) continue;
+        final key = parts[0].trim();
+        final value = parts[1].trim();
+        envs[key] = value;
+      }
+    }
+  } catch (e) {
+    log.warning('Failed to load .env file: $e');
+  }
+  // check for secret
+  final secret = envs['JWT_TOKEN_SECRET'];
   if (secret == null || secret.isEmpty) {
     throw Exception('JWT secret not configured. Define JWT_TOKEN_SECRET in environment.');
   } else {

backend/lib/database.dart

@@ -7,21 +7,34 @@ part 'database.g.dart';
 
 class Users extends Table {
   TextColumn get uuid => text().unique()();
-  TextColumn get gameRoom => text().references(GameRooms, #uuid).nullable()();
+  TextColumn get gameRoomUuid => text().references(GameRooms, #uuid)();
   TextColumn get name => text().withLength(min: 2, max: 32)();
   DateTimeColumn get createdAt => dateTime().nullable()();
+
+  @override
+  bool get isStrict => true;
 }
 
 enum GameStatus {
-  opened,
+  open,
   running,
   closed,
+  cancelled,
 }
 
 class GameRooms extends Table {
   TextColumn get uuid => text().unique()();
   TextColumn get status => textEnum<GameStatus>()();
+  TextColumn get code => text().withLength(min: 6, max: 6)();
   DateTimeColumn get createdAt => dateTime().nullable()();
+
+  @override
+  bool get isStrict => true;
+
+  @override
+  List<Set<Column>> get uniqueKeys => [
+        {code, status},
+      ];
 }
 
 @DriftDatabase(tables: [Users, GameRooms])
@@ -32,7 +45,7 @@ class AppDatabase extends _$AppDatabase {
   int get schemaVersion => 1;
 
   static QueryExecutor _openConnection() {
-    return NativeDatabase.createInBackground(File('./backend.db'));
+    return NativeDatabase.createInBackground(File('./db.sqlite'));
   }
 
   @override

backend/lib/middleware/auth_middleware.dart

@@ -0,0 +1,47 @@
+import 'dart:io';
+
+import 'package:backend/authenticator.dart';
+import 'package:dart_frog/dart_frog.dart';
+
+Authenticator? _authenticator;
+
+Middleware authenticatorMiddlewareProvider() {
+  return provider<Authenticator>((context) => _authenticator ??= Authenticator());
+}
+
+typedef Applies = Future<bool> Function(RequestContext context);
+
+Future<bool> _defaultApplies(RequestContext context) async => true;
+
+Middleware tokenAuthMiddleware({
+  Applies applies = _defaultApplies,
+}) {
+  return (handler) => (context) async {
+        if (!await applies(context)) {
+          return handler(context);
+        }
+        final auth = context.read<Authenticator>();
+        // use `auth.verifyToken(token)` to check the jwt that came in the request header bearer
+        final authHeader = context.request.headers['authorization'];
+        final auths = authHeader?.split(' ');
+        if (authHeader == null || !authHeader.startsWith('Bearer ') || auths == null || auths.length != 2) {
+          log.fine('Denied request - No Auth - ${context.request.method.value} ${context.request.uri.path}');
+          return Response(statusCode: HttpStatus.unauthorized);
+        }
+        final token = auths.last;
+
+        final (user, tokStatus) = await auth.verifyToken(token);
+
+        if (user == null) {
+          log.fine(
+              'Denied request - Bad Auth:$tokStatus - ${context.request.method.value} ${context.request.uri.path}, no auth');
+          return Response(statusCode: HttpStatus.unauthorized);
+        }
+
+        return handler(
+          context.provide(
+            () => user,
+          ),
+        );
+      };
+}

backend/lib/middleware/logger.dart

@@ -0,0 +1,24 @@
+import 'package:dart_frog/dart_frog.dart';
+import 'package:logging/logging.dart';
+
+final log = Logger('ServerLogger');
+
+Middleware loggerMiddleware() {
+  return (Handler handler) {
+    return (RequestContext context) async {
+      final request = context.request;
+      final startTime = DateTime.now();
+
+      final response = await handler(context);
+
+      final duration = DateTime.now().difference(startTime);
+
+      log.info(
+        '${request.method.name} ${request.uri.path} '
+        '${response.statusCode} ${duration.inMilliseconds}ms',
+      );
+
+      return response;
+    };
+  };
+}

backend/lib/service/db_access.dart

@@ -6,19 +6,40 @@ import 'package:uuid/uuid.dart';
 final log = Logger('Db');
 
 class Db {
+  static final _db = AppDatabase();
+
   static Future<User> getUser(String uuid) {
     log.finer('Getting user $uuid');
-    return AppDatabase().managers.users.filter((f) => f.uuid.equals(uuid)).get().then((u) => u.first);
+    return _db.managers.users.filter((f) => f.uuid.equals(uuid)).getSingle();
   }
 
-  static Future<User?> createUser({required String username}) => AppDatabase()
+  static Future<User?> createUser({required String username, required String roomCode}) async {
-          .managers
+    final room = await _db.managers.gameRooms
-          .users
+        .filter((f) => f.code.equals(roomCode) & f.status.isIn([GameStatus.open, GameStatus.running]))
-          .createReturningOrNull(
+        .getSingleOrNull()
-            (o) => o(createdAt: Value(DateTime.now()), uuid: const Uuid().v4(), name: username),
+        .catchError((Object err) {
-          )
+      log.info('Failed to find available room:$roomCode', err, StackTrace.current);
-          .catchError((Object err) {
+      return null;
-        log.severe('Failed to create user', err, StackTrace.current);
+    });
-        throw Exception(err.toString());
+    if (room == null) return null;
-      });
+    return _db.managers.users
+        .createReturningOrNull(
+      (o) => o(createdAt: Value(DateTime.now()), uuid: const Uuid().v4(), name: username, gameRoomUuid: room.uuid),
+    )
+        .catchError((Object err) {
+      log.severe('Failed to create user', err, StackTrace.current);
+      throw Exception(err.toString());
+    });
+  }
+
+  static Future<GameRoom> createRoom({required String roomCode}) => _db.managers.gameRooms
+          .createReturning(
+        (o) => o(createdAt: Value(DateTime.now()), status: GameStatus.open, uuid: const Uuid().v4(), code: roomCode),
+      )
+          .catchError(
+        (Object err) {
+          log.severe('Failed to create room', err, StackTrace.current);
+          throw Exception(err.toString());
+        },
+      );
 }

backend/main.dart

@@ -1,17 +1,27 @@
+import 'dart:developer' as dev;
 import 'dart:io';
 
 import 'package:dart_frog/dart_frog.dart';
 import 'package:logging/logging.dart';
 
-Future<HttpServer> run(Handler handler, InternetAddress ip, int port) {
+bool _listening = false;
-  // 1. Execute any custom code prior to starting the server...
 
-  final String logLevel = Platform.environment['LOG_LEVEL'] ?? 'INFO';
+Future<HttpServer> run(Handler handler, InternetAddress ip, int port) async {
-  Logger.root.level =
+  final isDevelopment = (await dev.Service.getInfo()).serverUri != null;
-      Level.LEVELS.firstWhere((l) => l.name == logLevel, orElse: () => Level.INFO); // defaults to Level.INFO
+  if (!_listening) {
-  Logger.root.onRecord.listen((record) {
+    final logLevel = Platform.environment['LOG_LEVEL'] ?? (isDevelopment ? 'FINEST' : 'INFO');
-    stdout.writeln('${record.level.name}: ${record.time}: ${record.message}');
+    Logger.root.level =
-  });
+        Level.LEVELS.firstWhere((l) => l.name == logLevel, orElse: () => Level.INFO); // defaults to Level.INFO
+    Logger.root.onRecord.listen((record) {
+      stdout.writeln('[${record.level.name}]:[${record.loggerName}] ${record.time}: ${record.message}');
+      if (record.level.value >= Level.WARNING.value) {
+        stdout.writeln(
+          '[${record.level.name}]:[${record.loggerName}] ${record.error ?? "No error provided"}\n${record.stackTrace ?? "No trace provided"}',
+        );
+      }
+    });
+    _listening = true;
+  }
 
   return serve(handler, ip, port);
 }

backend/routes/[roomCode]/_middleware.dart

@@ -1,17 +0,0 @@
-import 'package:backend/authenticator.dart';
-import 'package:backend/database.dart';
-import 'package:dart_frog/dart_frog.dart';
-import 'package:dart_frog_auth/dart_frog_auth.dart';
-
-Handler middleware(Handler handler) {
-  return handler.use(
-    bearerAuthentication<User>(
-      authenticator: (context, token) async {
-        final authenticator = context.read<Authenticator>();
-        return authenticator.verifyToken(token);
-      },
-      // says to apply the middleware to all routes
-      applies: (_) async => true,
-    ),
-  );
-}

backend/routes/_middleware.dart

@@ -1,15 +1,8 @@
 // lib/routes/tasks/_middleware.dart
+import 'package:backend/middleware/auth_middleware.dart';
+import 'package:backend/middleware/logger.dart';
 import 'package:dart_frog/dart_frog.dart';
-import 'package:logging/logging.dart';
-
-final log = Logger('');
 
 Handler middleware(Handler handler) {
-  return handler.use(
+  return handler.use(loggerMiddleware()).use(authenticatorMiddlewareProvider());
-    (handler) => (context) async {
-      final request = context.request;
-      log.info('${request.method.value} ${request.uri.path}');
-      return await handler(context);
-    },
-  );
 }

backend/routes/auth/index.dart

@@ -2,9 +2,11 @@ import 'dart:io';
 
 import 'package:backend/authenticator.dart';
 import 'package:dart_frog/dart_frog.dart';
-import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
+import 'package:logging/logging.dart';
 import 'package:shared_models/user.dart';
 
+final log = Logger('auth/');
+
 Future<Response> onRequest(RequestContext context) async {
   // Only allow POST requests
   if (context.request.method != HttpMethod.post) {
@@ -18,28 +20,36 @@ Future<Response> onRequest(RequestContext context) async {
 
     // Generate token
     final authenticator = context.read<Authenticator>();
-    final token = await authenticator.generateToken(username: createUserReq.username);
+    final token = await authenticator.generateToken(createUserReq);
 
     if (token == null) {
+      final body = CreateUserResponse(
+        success: false,
+        token: null,
+        error: 'Room ${createUserReq.roomCode} requested is not available',
+      ).toJson();
       return Response.json(
-        statusCode: HttpStatus.internalServerError,
+        statusCode: HttpStatus.badRequest,
-        body: {'error': 'Failed to generate token'},
+        body: body,
       );
     }
 
     // Return the token
     return Response.json(
-      body: {'token': token},
+      body: CreateUserResponse(token: token, success: true).toJson(),
-    );
-  } on JWTParseException {
-    return Response.json(
-      statusCode: HttpStatus.badRequest,
-      body: {'error': 'Username is required'},
     );
+    // }
+    //  on JWTParseException {
+    //   return Response.json(
+    //     statusCode: HttpStatus.badRequest,
+    //     body: {'error': 'Username is required'},
+    //   );
   } catch (e) {
+    log.severe('Error:', e);
+    final body = CreateUserResponse(success: false, token: null, error: 'Internal server error').toJson();
     return Response.json(
       statusCode: HttpStatus.internalServerError,
-      body: {'error': 'Internal server error'},
+      body: body,
     );
   }
 }

backend/routes/create_room.dart

@@ -0,0 +1,42 @@
+import 'dart:io';
+import 'dart:math';
+
+import 'package:backend/service/db_access.dart';
+import 'package:dart_frog/dart_frog.dart';
+import 'package:logging/logging.dart';
+import 'package:shared_models/room.dart';
+
+final log = Logger('create_room');
+
+Future<Response> onRequest(RequestContext context) async {
+  // Only allow POST requests
+  if (context.request.method != HttpMethod.post) {
+    return Response(statusCode: HttpStatus.methodNotAllowed);
+  }
+
+  try {
+    // Generate a random 6-letter room code
+    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+    final random = Random();
+    final roomCode = String.fromCharCodes(
+      Iterable.generate(
+        6,
+        (_) => chars.codeUnitAt(random.nextInt(chars.length)),
+      ),
+    );
+
+    // Create the room
+    final room = await Db.createRoom(roomCode: roomCode);
+
+    // Return the room code
+    return Response.json(
+      body: CreateRoomResponse(success: true, roomCode: room.code).toJson(),
+    );
+  } catch (e) {
+    log.severe('Error:', e);
+    return Response.json(
+      statusCode: HttpStatus.internalServerError,
+      body: CreateRoomResponse(success: false, roomCode: null, error: 'Internal server error').toJson(),
+    );
+  }
+}

backend/routes/room/[roomCode]/_middleware.dart

@@ -0,0 +1,7 @@
+import 'package:backend/middleware/auth_middleware.dart';
+import 'package:dart_frog/dart_frog.dart';
+
+// Middleware to check for jwt tokens on all routes under /room/[roomCode]/
+Handler middleware(Handler handler) {
+  return handler.use(tokenAuthMiddleware());
+}

flake.nix

@@ -28,15 +28,10 @@
             gtk3
             pcre
             libepoxy
+            # For drift
+            sqlite
 
-            # This group all seem not strictly necessary -- commands like
+            # Dev deps
-            # `flutter run -d linux` seem to *work* fine without them, but
-            # the build does print messages about missing packages, like:
-            #   Package mount was not found in the pkg-config search path.
-            #   Perhaps you should add the directory containing `mount.pc'
-            #   to the PKG_CONFIG_PATH environment variable
-            # To add to this list on NixOS upgrades, the Nix package
-            # `nix-index` is handy: then `nix-locate mount.pc`.
             libuuid  # for mount.pc
             xorg.libXdmcp.dev
             python310Packages.libselinux.dev # for libselinux.pc
@@ -48,11 +43,11 @@
             at-spi2-core.dev
             xorg.libXtst.out
             pcre2.dev
-
             jdk11
             android-studio
             android-tools
           ];
+          LD_LIBRARY_PATH = "${pkgs.sqlite.out}/lib";
           shellHook = ''
             export PATH="$PATH":"$HOME/.pub-cache/bin"
             echo -e "\e[44m                          \e[0m"

shared_models/lib/room.dart

@@ -0,0 +1,25 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'room.g.dart';
+
+@JsonSerializable()
+class CreateRoomRequest {
+  final bool success;
+  CreateRoomRequest({required this.success});
+  factory CreateRoomRequest.fromJson(Map<String, dynamic> json) => _$CreateRoomRequestFromJson(json);
+
+  Map<String, dynamic> toJson() => _$CreateRoomRequestToJson(this);
+}
+
+@JsonSerializable()
+class CreateRoomResponse {
+  final bool success;
+  final String? roomCode;
+  final String? error;
+
+  CreateRoomResponse({required this.success, required this.roomCode, this.error});
+
+  factory CreateRoomResponse.fromJson(Map<String, dynamic> json) => _$CreateRoomResponseFromJson(json);
+
+  Map<String, dynamic> toJson() => _$CreateRoomResponseToJson(this);
+}

shared_models/lib/user.dart

@@ -2,30 +2,26 @@ import 'package:json_annotation/json_annotation.dart';
 
 part 'user.g.dart';
 
-@JsonSerializable()
-class User {
-  final String id;
-  final String name;
-  final String? roomId;
-
-  User({
-    required this.id,
-    required this.name,
-    this.roomId,
-  });
-
-  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(json);
-
-  Map<String, dynamic> toJson() => _$UserToJson(this);
-}
-
 @JsonSerializable()
 class CreateUserRequest {
   final String username;
+  final String roomCode;
 
-  CreateUserRequest({required this.username});
+  CreateUserRequest({required this.username, required this.roomCode});
-
   factory CreateUserRequest.fromJson(Map<String, dynamic> json) => _$CreateUserRequestFromJson(json);
 
   Map<String, dynamic> toJson() => _$CreateUserRequestToJson(this);
 }
+
+@JsonSerializable()
+class CreateUserResponse {
+  final String? token;
+  final String? error;
+  final bool success;
+
+  CreateUserResponse({required this.token, required this.success, this.error});
+
+  factory CreateUserResponse.fromJson(Map<String, dynamic> json) => _$CreateUserResponseFromJson(json);
+
+  Map<String, dynamic> toJson() => _$CreateUserResponseToJson(this);
+}