curl --request POST \
  --url https://api.wirespeed.co/team/statistics/operating-systems \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "startDate": "<string>",
  "endDate": "<string>",
  "days": 123
}
'

{
  "operatingSystems": [
    {
      "operatingSystem": "<string>",
      "count": 123
    }
  ]
}