Get an existing Sink backend configuration

Example response

{
  "backend": "prometheus",
  "description": "Prometheus time series database sink",
  "config": [
    [
      {
        "title": "Remote Host",
        "type": "string",
        "name": "remote_host",
        "description": "The remote host to send Prometheus metrics too"
      }
    ]
  ]
}