Add more fields to the User struct to capture more of the responses from Confluence Cloud

[rosecodym]

Is your feature request related to a problem? Please describe.
Confluence Cloud returns user objects with rich representations that include many properties not represented by the User struct. I noticed this in particular because of the email property, but there are several others missing.

Describe the solution you'd like
I would like the User struct to include a field holding the returned email field.

Describe alternatives you've considered
Direct access to the response body might provide a workaround for this and any other missing properties, but that seems like more work than simply adding an email field.