Django User default permission

I want to add permissions (view, add, change, delete) to every user, so I add this meta class in each Model

class Meta:
   default_permissions = ('add', 'change', 'delete', 'view')

but when I log in (with new user) to the Django admin site, the user hasn't got the permission yet. Is my approach wrong?

EDIT: I solved this by adding this code to my registration form

permission_list = ['view_depot','view_courier','view_client',
                                'add_depot','add_courier','add_client',
                                'change_depot','change_courier','change_client',
                                'delete_depot','delete_courier','delete_client']
permission_list = list(map(lambda x : Permission.objects.get(codename=x), permission_list))
user.user_permissions.add(*permission_list)

if anyone know simpler method than feel free to share here