Discount Coupon for first time customers only

Is there a way to set up coupon codes to be for first time customers only? I don’t see a way to set this up so trying to figure it out.

example:

$5 off your first haircut with us

does not apply to existing customers 

No one?

I haven't encountered a way to do that through the acuity scheduling app, but on the website you can use a pop up that only targets first time visitors. Not sure if that's super helpful tho.

There is also the "each customer can use this once" feature for coupons in the scheduling app, but it doesn't necessarily only target first time visitors.