The leaderboard shouldn't error if LoggedActions have a null user
The leaderboard shouldn't error if LoggedActions have a null user

mysociety/yournextmp-popit,mysociety/yournextrepresentative,neavouli/yournextrepresentative,mysociety/yournextrepresentative,neavouli/yournextrepresentative,neavouli/yournextrepresentative,mysociety/yournextrepresentative,mysociety/yournextrepresentative,mysociety/yournextrepresentative,neavouli/yournextrepresentative,mysociety/yournextmp-popit,mysociety/yournextmp-popit,neavouli/yournextrepresentative,mysociety/yournextmp-popit,mysociety/yournextmp-popit