public static string[] RedGetAllUsersIds() 
        {
            try
            {
                List<string> UserIds = new List<string>();
                
                RedmineManager = new RedmineManager(host, apiKey);

                var users = RedmineManager.GetObjects<User>(new NameValueCollection()
                {
                    {RedmineKeys.STATUS, ((int) UserStatus.STATUS_ACTIVE).ToString(CultureInfo.InvariantCulture)}
                });

                foreach (var user in users)
                {   
                    UserIds.Add(user.Id.ToString());
                }
                return UserIds.ToArray();
            }
            catch(Exception ex)
            {
                lastException = ex;
                return null;
            }
        }