获取用户等级

{
    "code": 0,
    "message": "success",
    "data": {
        "level": 0,
        "exp": 0,
        "next_level_exp": 0,
        "prev_level_exp": 0,
        "progress": 0,
        "level_name": "string",
        "next_level_name": "string",
        "rules": [
            {
                "level": 0,
                "name": "string",
                "min_exp": 0,
                "max_exp": 0
            }
        ]
    }
}