Gamemode blueprint with a players array in it 4-26

Hi, I was watcing the text chat tutorial and the host said that the blueprint, screenshot of which I pinned, is coming with any gamemode blueprint class, but I dont have one. Can anyone help me and find it if he has one similar to whats on the screenshot

The link to the video is : UE4 Multiplayer Mechanics PART 4: Chat (Part 1) - YouTube