Which is NOT a necessary step to complete this setup for instance principals?

Instance principals in OCI allow compute instances to directly make API calls against OCI services without requiring a user account. To set up instance principals, the following steps are necessary:

A. Deploy the application and SDK: The application running on the instances must use the OCI SDK or CLI to make API calls.

B. Create a dynamic group: Define a dynamic group with matching rules to identify which instances can use the API permissions.

C. Create a policy: Write an IAM policy that grants the dynamic group the necessary permissions to access services.

Option D is NOT necessary because instances in a dynamic group use instance principals to authenticate and do not require Auth Tokens, which are used for user authentication with APIs.