curl --request POST \
  --url https://api.genova.gg/v1/rooms \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --data '
{
  "character_ids": [
    "<string>"
  ]
}
'

{
  "id": "<string>",
  "created_at": "2023-11-07T05:31:56Z"
}