Get a customer
Retrieves a single customer by UUID or by external_id. If the provided id is not a valid UUID, it is treated as an external_id lookup.
Retrieves a single customer by UUID or by external_id. If the provided id is not a valid UUID, it is treated as an external_id lookup.
Use a secret key (sk_test_* or sk_live_*) for full read/write access, or a public key (pk_test_* or pk_live_*) for read-only access.
The customer UUID or external_id.