Rather than having the signup/login 'page' at the ...

# decompose

[Samuel]

Rather than having the signup/login 'page' at the beginning I have it 'popup' when an authenticated task is attempted to be performed.

What's the best way to goto /auth and do that whole cycle of things (including possibly OAuth2 with `redirect_uri`s and all) then return back to the original task that needed authentication and perform that