public class GameMode : BaseMode
    {
        protected override async void OnPlayerRequestClass(BasePlayer player, RequestClassEventArgs e)
        {
            await ShowDialog(player);
        }

        protected override async void OnPlayerRequestSpawn(BasePlayer player, RequestSpawnEventArgs e)
        {
            await ShowDialog(player);
        }

        private static async Task ShowDialog(BasePlayer player)
        {
            var dialog = new InputDialog("Test", "Test dialog", true, "OK", "EXIT");
            await dialog.ShowAsync(player);
        }
    }