Silly qn re a rule to fire a zap

I’m implementing this: Trigger a Zap on Every User Login

WIthin it is the below snippet:{
url : configuration.ZAP_HOOK_URL,
json: payload_to_zap

How exactly should the url look if I replace ZAP_HOOK_URL??

If I just drop in the zap webhook URL it throws syntactical errors. Thanks.