获取用户信息（含 API Key）

{
    "code": 200,
    "msg": "success",
    "data": {
        "api_key": "sk-xxxxxxxx",
        "id": 1,
        "username": "user123",
        "nickname": "用户昵称",
        "email": "user@example.com",
        "email_verified": true,
        "role": 0,
        "balance": 100.5,
        "points": 500,
        "created_at": "2025-01-01T00:00:00Z",
        "membership_level": 1,
        "membership_expire_at": "2025-12-31T23:59:59Z",
        "is_developer": false,
        "developer_balance": 0,
        "notification_preferences": {},
        "api_ip_whitelist": ""
    }
}