/// <summary>
 /// 是否存在用户信息
 /// </summary>
 /// <param name="token">用户token</param>
 /// <returns>存在返回true,不存在返回false</returns>
 public bool ContainsUserInfo(string key)
 {
     lock (RedisDataBase)
     {
         return(RedisDataBase.KeyExists(key));
     }
 }