[RFC] Add a new "name" field to User entity

[yceruto]

Following @javiereguiluz's comment: #439 (comment)

for the users I'd like to display people names instead of emails (so we might need to add a field in the user entity).

There is any privacy/security reasons to do that?
This should be named name or fullName?

What do you think?

[javiereguiluz]

I agree with adding a fullName property in the User entity ... but not any other property, to keep things simple.

[yceruto]

👍

[yceruto]

This property should be optional or mandatory?

[javiereguiluz]

Closing it as fixed by #457.