Retrieves plan, usage, and limit information for the current account.

The response includes plan tier, upload eligibility, and links to billing pages.
Usage and limit details (media counts, storage, seats, bandwidth) are only visible
to account owners and managers — other contacts receive null for the limits field.

Requires api token with one of the following permissions

(any scope allowed)

Tokens with the "Act with a team member's permissions" permission
(all:delegate_to_contact_permissions scope) can also be used. Requests
made with such a token are authorized using the permissions of the
contact assigned to the token.