As a user, it's not clear to me that I need to log into the mapper frontend

[spwoodcock]

Is your feature request related to a problem? Please describe.

• When I load the mapper frontend, by default I am logged in as 'localadmin'.
• This is an implementation detail that as a user I don't care about.
• To log in I have to 'log out', then log in again as my user.
• I am not informed that this is necessary for my edits to be attributed.

Describe the solution you'd like

Hide 'localadmin':

• If the user is 'localadmin', i.e. the temp auth is used, then this should be hidden from the user.
• Instead, from the user perspective, the UI should be shown as logged out (the Sign In option should be present).
• When the user signs in, the token generated will override the temp auth token, and the user details will be shown at the top right.

Inform the user they should log in:

• We need a way to inform the user that they need to log in to be attributed with their edits.
• Instead, perhaps at the top right, instead of 'localadmin', we show 'Not logged in'.
• A tooltip could be shown when hovering that text to say 'You must log in for your edits to be attributed to your user account.'

Describe alternatives you've considered

• This could be done via the project setup promps, but would probably become too cluttered.