I am getting an InvalidScope when trying to Create Customers. I believe this requires additional privileges. I think our account should be already upgraded to premium to allow us access to that. Is this something you can enable at your end please?
@Sagar_Babber, Is this error returned in our Sandbox environment? ManageCustomers is a privileged scope in our production environment. If your application has been approved to launch in production with creating API Customers then please contact your Account Manager for further assistance.