Oauth2 Client credentials Order Api Error

[former_member647437]

Im trying to hit the below url through postman client to get the order history of a user:

https://localhost:9002/mycustomcommercewebservices/v2/customsite/users/requestor@gmail.com/orders

The token is getting generated using the client credentials grant type,but when i pass this access token in header im getting the below error

{ "errors": [ { "message": "Access is denied", "type": "ForbiddenError" } ] }