Feedback help!!!!! they removed the gameManager in unity class 2019

well, I am an amateur programmer working on a 2d rpg with the help of a unity 2018 course in udemy, the problem is the following, the instructor uses the following syntax:

GameManager.instance.player.transform

The 2019 version of unity does not have this class, and I don't know how I can get the same results with another method, I am trying to implement it in a soft AI so that an enemy can identify the player's position and go in their direction .

 

There has never been a class called GameManager in Unity. This was likely a class created earlier in the course/tutorial.

 

I just realized the error, currently working on the GameManager, I appreciate the quick response to my problem, I would be happy to review your posts