fax.vendor domain setting. Numbers that already exist stay on the vendor holding them.Authorization: Bearer ********************curl --location 'https://awqacore01.crexendocloud.com/ns-api/v2/domains/acme.example.com/fax/vendor' \
--header 'Authorization: Bearer <token>'{
"domain": "acme.example.com",
"vendor": "faxback",
"source": "setting",
"setting": "faxback",
"configured-vendors": [
"phaxio",
"faxback"
]
}