laravel检查集合是否包含模型

Question

我有很多关系：

users (id)

user_game (user_id, game_id)

games (id, title)

我想检查游戏是否与特定用户相关联：

$user = User::find(1);
$game = Game::where('title', 'pacman');

$gameUsers = $game->users()
$gameHasUser =  >>> $gameUsers contains $user <<< // How can I do this?