### Multiplicative group of integers mod n?

I'm guessing this is pretty basic, but I'm also new to Sage and can't find anything about it.

I know how to work with the ring of integers mod n. Is there something analogous for the multiplicative group of integers mod n?

Something like:

```
G = Mult_Integers(5)
list(G)
[1, 2, 3, 4]
```

Googling has been surprisingly fruitless.

Thanks!