修正了 SDK，修复了 aggregate 不能传入 args 的问题

backend/view.py

@@ -61,7 +61,7 @@ from users.models import (
     UserGuanshi, UserBoss, UserZuzhang,
     UserKefu, UserDashou, Xiugaijilu, UserShangjia, UserShenheguan
 )
-from gvsdsdk.models import User
+from users.business_models import User
 
 ## orders
 from orders.models import (