See also the Address response object.

address = gateway.address.find("a_customer_id", "an_address_id")

If the address or customer can't be found, it will raise a Braintree::NotFoundError.

customer_id required, String

A string value representing an existing customer in your Vault.

address_id required, String

The two-letter value for an address associated with a specific customer ID. The maximum number of addresses per customer is 50.