How Did You?

I think I may have scared my pool guy a bit today. I heard the three older pups doing their "someone's here" bark and I look out the window and see the gate closing. 

Umm, I was told you had to have a clicker or the code to get in? I go outside and say sternly, "How did you get in here?!" He informed me there's a pass thru button on all those gates and if we didn't lock the box, he can just push it. Well we're getting a lock for the box. 

I'm not actually upset he got in, I just wish I'd known. We feel very safe in our community, but that's essentially our doorbell. I mean, I've already got the dogs barking letting me know, but still.