Check on which player start has player spawned

If have 5 player starts and player spawns randomly on one of them, when he spawns i want to know on which player start is he spawned

You need to hook up in to spawn system, you can do that by overriding various function in GameMode, good spot would be ChoosePlayerStart or FindPlayerStart. When you override you need to call parent class first so you don’t block original system, right click the function input node and click “Add call to parent class” and call it, now on output pins of parent call you will have selected PlayerStart. Note that ChoosePlayerStart don’t need to be always called on respawn.