UE4 Blueprint Mulitplayer - No Cast to GameplayPC node

I’m following the UE4 Blueprint Multiplayer tutorial series…ndZqZ&index=23
This allows players to access the game and play online. I’m having a problem, in Part 23 at 11 minutes and 11 seconds into the video, the video says from the Custom Event node “Event on Logout” you draw out from Event Controller and connect it to a “Cast to GameplayPC” node. I don’t have a Cast to GameplayPC node. So how do I make one? and which file would it be in? The name of this node group is: Event on Logout - Destroy Session Call on Game Info Instance.

It is a PlayerController Blueprint type that he creates in video 2 at 9 minutes 40 seconds.