Invoices ======== | ``/api/v1/$FLOCK/user/{uid}/invoices/`` | ``/api/v1/$FLOCK/user/{uid}/invoices/status/(?P[\w\-]+)/`` | ``/api/v1/$FLOCK/user/{uid}/invoices/(?P[\w\-]+)/`` | ``/api/v1/$FLOCK/user/{uid}/invoices/(?P[\w\-]+)/pdf/``