Need help creating a widget while posessing a pawn

What can I reference when I possess a pawn that the “create a widget” node will accept. I tried get player controller, but it’s not making the widget appear. What I’m trying to accomplish is having a hud appear after getting in vehicle, and making it disappear when I exit the vehicle.

Can you show us the main source of the blueprint that makes your character enter the vehicle? I’m pretty sure there might be a node that makes a widget visible. (I’m still learning blueprint but I think I know what can make it appear)

bump still need help!