怎么知道wifi有几个人在用

{"name":"\u600e\u4e48\u77e5\u9053wifi\u6709\u51e0\u4e2a\u4eba\u5728\u7528","type":"\u5211\u4fa6\u5267","area":"\u9999\u6e2f","year":"1990","lang":"\u6cf0\u8bed","play":"\u9ad8\u6e05\u7248","type1":"\u5211\u4fa6\u5267"}