wrapups with "if err", uid doesn't exists
wrapups with "if err", uid doesn't exists

hit an issue, when the uid is the member of a group
though the member with uid doesn't exist at all

Signed-off-by: Anton Arapov <1d48fa088bebccfc92d6ed63ffdef4532fbd78df@gmail.com>

arapov/pile,arapov/pile