curl --request POST \
  --url https://services.pref.rio/rmi/v1/admin/beta/whitelist/{phone_number} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "group_id": "<string>"
}
'

{
  "added_at": "<string>",
  "group_id": "<string>",
  "group_name": "<string>",
  "phone_number": "<string>"
}