Webhook basics help please

Hi. I’m trying to setup a webhook so I can send weather intelligence notifications to HomeSeer (the plugin doesn’t currently support weather intelligence). I’m struggling to get started on setting up a test webhook using Postman. I tried setting up a global variable for the ApiKey - I’m assuming that’s the token we can grab from the webapp. However everytime I execute the following: https://api.rach.io/1/public/person/info
I keep getting a 401 unauthorized error.

See the below Postman UI for reference. Thanks in advance for help!

Did you ever figure this out? I am doing the same thing with an http get and getting the same error.