Limit the spawn of actor to 1?

Hello,
I am using unreal and arkit.
so when i demonstrate my concept using a app on iphone, whenever i touch my screen it spawns an actor.
is it possible to have only one spawn at the start and not spawn anything after that even if the screen is touched.
i believe this would have its setting under level blueprint.
I am trying to limit my actor spawn to only one and have its life span to forever.
please help.
thank you.

Add that to your Touch Event https://i.imgur.com/qfnaSEd.png and please invest some time in Learning thats one of the most basic Questions.

You can use a DoOnce node.

Thank you very much for replying, i tried the DoOnce node and it worked.
really appreciate you replying to my post.