The Authentication Service can be configured to allow users to register new accounts or couple devices to their identity.
This is done at the registration endpoint. As with the authentication endpoint, the URI of the registration endpoint
can be anything that is configured. It will end with the string create and the authenticator ID that will handle the
account registration and creation. Because the actual URI can vary, example/register is used below as a
Initiates the creation and registration of a new user account.