余额查询 /dashboard/billing/credit_grants

{
    "object": "credit_summary",
    "total_granted": 5,
    "total_used": 5,
    "total_available": 0,
    "grants": {
        "object": "list",
        "data": [
            {
                "object": "credit_grant",
                "id": "ed7b8ddc-3fc1-4fa4-97cb-18d026cc8521",
                "grant_amount": 5,
                "used_amount": 5,
                "effective_at": 1680480000,
                "expires_at": 1690848000
            }
        ]
    }
}