How do I edit the new user invitation email? (YouTrack InCloud)

I've a new YouTrack InCloud instance and I've been inviting users to use it, and one of them came to asking if I had really send them an email because that email looked suspiciously spammy. I've attached the screenshot.

I agree with that user, I've no idea why the email says Hub instead of YouTrack or better yet <Company Name> YouTrack.

How can I update it to at least change the name? It would be nice to add my company logo too.