Get the top-up status for the current account

{  "success": true,  "purchase": {    "id": "string",    "pack_name": "string",    "credits": 0,    "amount": 0,    "currency": "string",    "kind": "credits",    "status": "pending",    "created_at": 0,    "paid_at": 0  },  "property1": null,  "property2": null}