add oc_user::getUser to get the user id of the loggedin user

admin/ajax/changepassword.php

admin/ajax/creategroup.php

admin/ajax/createuser.php

admin/ajax/removegroup.php

admin/ajax/removeuser.php

admin/ajax/togglegroups.php

admin/apps.php

admin/system.php

admin/users.php

apps/files_publiclink/lib_public.php

files/admin.php

lib/base.php

lib/l10n.php

lib/user.php

log/index.php

settings/ajax/setlanguage.php

settings/index.php