it was added because in some cases method list user ids for project returns   dumb   member  it s happened because sometimes members returning in the follow form  member  u cn   dumb   dc nonexistent u cn d a dbb  bb d b c fddf  ou users cn example cn com  in this case member is   dumb  and i added this test and test list user ids for project   dumb   member to ensure that such members will be missed