Hi jayvin,We registered it as a private App only and we're passing API key and password in the request but still getting 200 instead of 201response status code.Thanks in advance 

 https://{{api_key}}:{{api_password}}@{{store_name}}.myshopify.com/admin/api/{{api_version}}/orders/3825632870598/fulfillments.json request body:{    "fulfillment": {        "location_id": 905**4977,        "tracking_number": 1411******19004625,     ...