Some users shows up as null

[jelenajjo]

Not sure at this point what is causing some users to show up as null

[shtefcs]

I think when the username is two words, like Jelena Jovanovic or Veselin Nikolic that it's show null.

[shtefcs]

From the chat by Tahy:

the reason it shows null on extension is because it's set up like that.
display elem.user.displayName or elem.user.slug instead of `elem.user.username

[unigazer]

PR @ #14