curl --request POST \
  --url https://neo.api.projectdiscovery.io/api/v1/billing/subscription/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "credits_per_user": 123,
  "demote_member_emails": [
    "<string>"
  ],
  "seats": 123
}
'

{
  "amount_due_cents": 123,
  "amount_due_display": "<string>",
  "effective_at": "2023-11-07T05:31:56Z",
  "immediate": true,
  "line_items": [
    {
      "amount_cents": 123,
      "amount_display": "<string>",
      "description": "<string>"
    }
  ],
  "prorated_credits": 123
}