feat(exam-users): allow resolving exam users by eppn on csv-import

src/Handler/Exam/Users.hs

@@ -937,6 +937,7 @@ postEUsersR tid ssh csh examn = do
               guessUser' ExamUserTableCsv{..} = do
                 let criteria = PredDNF . maybe Set.empty Set.singleton . fromNullable . Set.fromList . fmap PLVariable $ catMaybes
                       [ GuessUserMatrikelnummer <$> csvEUserMatriculation
+                      , GuessUserEduPersonPrincipalName <$> csvEUserEPPN
                       , GuessUserDisplayName <$> csvEUserName
                       , GuessUserSurname <$> csvEUserSurname
                       , GuessUserFirstName <$> csvEUserFirstName