How to have inputs with array value

Hi,

I'm not sure if I'm clear so let me show an example. In HTML I can do this:

```html
First user:

Second user:

```

Once submitted that form will send data as an array.

How can I reproduce that with Form Builder?
I have a form right now that creates a new input group when a button is clicked. But I don't know what `name` to give these inputs. Is there a trick already available?

Thanks for any help.