Buy Premium

curl --request POST \
  --url https://fragapi.ru/v1/premium/buy \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "username": "<string>",
  "months": "3"
}
'

{
  "success": true,
  "transaction_hash": "<string>"
}