FBscript.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Facebook.Unity;

public class FBscript : MonoBehaviour {
	void Awake()
	{
		FB.Init (SetInit, OnHideUnity);
	}

	void SetInit() {
		if (FB.IsLoggedIn) {
			Debug.Log ("FB is logged in");
		} else {
			Debug.Log ("FB is not logged in");
		}
	}

	void OnHideUnity(bool isGameShown)
	{
		if (!isGameShown) {
			Time.timeScale = 0;
		} else {
			Time.timeScale = 1;
		}
	}

	public void FBlogin()
	{
		List<string> permissions = new List<string> ();
		permissions.Add ("public_profile");
		FB.LogInWithReadPermissions (permissions, AuthCallBack);
	}

	void AuthCallBack(IResult result)
	{
		if (result.Error != null) {
			Debug.Log (result.Error);
		} else {
			if (FB.IsLoggedIn) {
				Debug.Log ("FB is Logged In");
			} else {
				Debug.Log ("FB is Not Logged In");
			}
		}
	}
}