Get all available product offerings a subscription can be changed to and when the change can take effect.
When the subscription can be changed typically depends on the network setup, billing cycle, and current product offering. As a rule of thumb (though not always), upgrades and lateral moves are immediate, while downgrades take effect at the next renewal date.
An API key that grants access to the Connect API. You can create and manage API keys in the portal.
The identifier of the subscription. May be the entity's internal UUID or an external reference identifier.
Reference identifiers MUST be prefixed with rid_ (e.g., rid_crm-subscription-12345) so the API
can distinguish them from internal UUIDs. The prefix is stripped before lookup.
Available change options.