code: func (m *Manager) isDirectOwnerOfOrgs(globalIDs []string, username string) (ownedOrgs []string, err error) {
  	var orgs []Organization
  	err = m.collection.Find(bson.M{"globalid": bson.M{"$in": globalIDs}, "owners": username}).Select(bson.M{"globalid": 1}).All(&orgs)
  	ownedOrgs = make([]string, len(orgs))
  	for i, org := range orgs {
  		ownedOrgs[i] = org.Globalid
  	}
  	return
  }
docs: // isDirectOwnerOfOrgs takes a list of organizations and a username, and returns a list of organizations where
  // this username is in the list of "owners"