Present user names from Azure in first_name last_name format

[parndt]

Currently when users register with Azure, we appear to be taken the value from name which are often formatted like [last_name], [first_name].

Instead we want to create the name from combining the fields first_name and last_name (provided by Azure) to the more friendly [first_name] [last_name].

Fixes #382

[parndt]

dont use azure's name but instead combine azure's first_name and last_name fields

@tmfrnz done! Whoops.