curl --request POST \
  --url 'https://api.flashcat.cloud/rum/facet/count?app_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "start_time": 123,
  "end_time": 123,
  "scope": "session",
  "facet_key": "created_at",
  "facet_value": "<string>",
  "dql": "<string>",
  "sql": "<string>",
  "limit": 50
}
'

{
  "error": {
    "code": "<string>",
    "message": "<string>"
  },
  "data": {
    "items": [
      {
        "facet_value": "<string>",
        "count": 123
      }
    ]
  }
}