game: add: close game when nobody in

games/models.py

@@ -16,6 +16,11 @@ class GameModel(models.Model):
     def start(self):
         self.started = True
     
+    def finish(self, winner_id):
+        self.winner_id = winner_id
+        self.finished = True
+        self.save()
+    
     def get_players_id(self):
         return [game_player.player_id for game_player in GameMembersModel.objects.filter(game_id = self.pk)]