Create an authentication token

First, create an API client to access Sandbox.

To use Sandbox for testing property changes, you need to create an API client that contains both the Sandbox and Property Manager APIs with read-write access. Follow the steps in Get Started with APIs to learn how to configure authentication credentials to access the API.
API Authorizations for Sandbox
API Authorizations for Sandbox

When you create an API token to access an Akamai service, the token inherits permissions associated with the identified username. If the API token was created based on a user that has a custom role, you need to confirm in Control Center that the custom role has Sandbox - Edit and Sandbox - View only permissions assigned.

Sandbox user permissions
Sandbox user permissions