Daniel Thee Roperto authored Aug 30, 2018 and Robert Lyon committed Nov 04, 2018

 Add a pre-login hook to check if user is already logged in,
 giving each auth plugin the chance to authenticate or redirect the user as
 needed.

behatnotneeded

Change-Id: I690fd174a02e9ffd26b8e3c8f3efad041b54d3da