The createByRateId allows you to create a shipping label by using a rateId which is a unique identifier tied to a specific rate.

This helps ensure that when a user is rate shopping, they can purchase a label for the price they were initially rated.

The createByShipmentId allows you to create a shipping label by using a shipmentId which is a unique identifier tied to a specific shipment that has already been created with the desired address and package info.

The export method allows to export a CSV document of labels based on the provided parameters.

The get method retrieves a specific label by labelId.

The list method retrieves a list of labels created by a given user.

The void method allows a user to void a label by labelId.