Rest-API: Comments and author_id

Hi,

I'd like to enhance my g3Mobile app by an update to the comments functionality.
I thought about making it pretty much like the sms-app.

For this I need the 'author-name' and 'author-email' (to get an avatar-image if there's one).

I checked the existing comments module. For guest-users I get what I need.
But I'm struggling for logged-in users. I only get an 'author_id'.

How can I get their name and email via the Rest-API?

Thx,
  David
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