fix : assign event type in class

lobby.events.ts

@@ -2,20 +2,22 @@ import { GameResponseDTO } from './dto/gameresponse.dto';
 import { PlayerResponseDTO } from './dto/playerresponse.dto';
 
 export class GameCreateEvent extends GameResponseDTO {
-  type: 'create';
+  type = 'create';
 }
 
 export class GameDeleteEvent {
-  type: 'delete';
-  constructor(public id?: number) {}
+  type = 'delete';
+  constructor(public id?: number) { }
 }
 export class GameJoinEvent {
-  type: 'joingame';
+  type = 'joingame';
   gameId: number;
   constructor(
     public player: PlayerResponseDTO,
     game?: Partial<GameResponseDTO>,
   ) {
-    this.gameId = game.id;
+    if (game && game.id) {
+      this.gameId = game.id;
+    }
   }
 }