Zendesk Curl Command that returns a 500 in Xano but works in postman

Hi everyone,

I'm a bit puzzled but I don't find the solution (though I'm sure it's something very simple I am missing).

I have a curl command I am implementing on Xano to push data to Zendesk Sell CRM (https://developer.zendesk.com/api-reference/sales-crm/resources/contacts/).

When I test the curl command on Postman or from my terminal, it works correctly and creates the contact.

When I import the exact same curl in Xano as a function, I got a 500 error.

I don't understand why...

It is getting critical so I more than welcome any suggestions. Thanks in advance