curl --request POST \
  --url https://api.aimtell.com/prod/site/{idSite}/permitted \
  --header 'Content-Type: application/json' \
  --header 'X-Authorization-Api-Key: <api-key>' \
  --data '
{
  "email": "<string>"
}
'

{
  "result": "success",
  "message": "Added user ab123c4d55ef succesfully.",
  "id": 12345
}