How to insert the group_id of a user to 'auth_user_groups' table
details = User(username = "somename",password = "somepassword", email = "email",
first_name =  "firstname",
last_name =  "lastname",
is_staff = 0,
is_active = 1,
is_superuser = 0
)
details.save()

save = auth_user_groups(user_id=1,group_id = 5)

user = User.objects.get(id=1)
group = Group.objects.get(id=5)

user.groups.add(group)