sing UnityEngine.SocialPlatforms;
using UnityEngine.UI;

public class Helion: MonoBehaviour {

    void Start()
    {
		GooglePlayGames.PlayGamesPlatform.Activate();
		TrySignIn();
    }

public void TrySignIn()
{
  if (!Social.localUser.authenticated)
        {
            Social.localUser.Authenticate((bool succes) =>
            {
                if (succes)
                {
                    Debug.Log("OK");
                }
                else
                {
                    Debug.Log("Something Wrong");
                }
            });
        }
}

}