SAP PUT method not working on Appgyver, but on Postman

Hi Expert .
I am trying to post data from Appgyver to SAP on-premise with delivery picking scenarios using “LE_SHP_DELIVERY_PICK” REST API. I have tried from postman that was working perfectly, but when I bring whole parameters to Appgyver believe me I have checked over hundreds times for requested data each, it throw me 403 error that make me crazy all day long. does someone have face same issues and get resolved before ?