curl --request POST \
  --url https://api.pagou.ai/v2/checkout/{slug}/session \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "referrer_url": "<string>"
}
'

{
  "success": true,
  "requestId": "<string>",
  "data": {
    "session_token": "<string>",
    "expires_at": "<string>"
  }
}