如何在django中创建可以创建其他用户但不授予权限（仅授予预定义组权限）的用户？

I want to be able to create a user (in openwisp2 which is django based), who in turn, can create another user but not be able to grant individual permissions for this user. Only only granting predefined group permissions should be allowed for this new user.I want to be able to create a user (in openwisp