def update_stat_by_id(cls, id, type='update'):
     if type == 'update':
         new_user_stat = 3 - UserModel.get_user_info_by_id(id)['stat']
         return UserModel.update_user_stat_by_id(id, new_user_stat)
     else:
         return UserModel.update_user_stat_by_id(id, 3)
 def get_user_info_by_id(cls, id):
     return UserModel.get_user_info_by_id(id)