I don't have enough reputation to make comments on this site (what a weird system), so I have to make this a question on its own.
I am referencing an answer made to another question about the differences between logged-in and logged in, that is located here: https://english.stackexchange.com/a/11002/127722
The user whose answer was accepted, has written his own example which reads:
the user login was not successful
But isn't that wrong? I thought correct forms would be either:
the user-login was not successful
user's login was not successful
Which is (are) correct?