Access SharePoint Online using Postman(POST): Getting 403 Forbidden error

Hi,

Below is the scenario where i am getting 403 error while using Postman - POST request . 

Get is working fine but when i generate POST request using Postman to SharePoint 2016 , it is throwing the below error.

URL using for POST request in postman: 

https://pd2.spt.ford.com/sites/data/_api/contextinfo