curl --request GET \
  --url https://api.pelanor.io/v1/custom-metrics/ \
  --header 'Authorization: Bearer <token>'

{
  "custom_metrics": [
    {
      "created_at": "<string>",
      "created_by_email": "<string>",
      "description": "<string>",
      "filters": [
        {
          "operator": "Equals",
          "property": {
            "type": "Region"
          },
          "values": [
            "<string>"
          ]
        }
      ],
      "id": "<string>",
      "modified_at": "<string>",
      "property": {
        "type": "Region"
      },
      "status": "StatusUnknown",
      "title": "<string>"
    }
  ]
}