GetUserAccountById() private method

private GetUserAccountById ( long userAccountId ) : UserAccount
userAccountId long
return SpringMvc.Models.POCO.UserAccount
        public void ChangeUserPassword(long userId, String newPassword)
        {
            UserAccount userAccount = UserInformationService.GetUserAccountById(userId);

            userAccount.Password = AuthorizationService.EncryptPassword(newPassword);
            AccountAdministrationDao.SaveOrUpdateUser(userAccount);
        }
        public void EditUserPersonalData(long userId, PersonalData personalData)
        {
            UserAccount userAccount = UserInformationService.GetUserAccountById(userId);

            userAccount.PersonalData.FirstName          = personalData.FirstName;
            userAccount.PersonalData.LastName           = personalData.LastName;
            userAccount.PersonalData.PESEL              = personalData.PESEL;
            userAccount.PersonalData.PhoneNumber        = personalData.PhoneNumber;
            userAccount.PersonalData.Address.Street     = personalData.Address.Street;
            userAccount.PersonalData.Address.PostalCode = personalData.Address.PostalCode;
            userAccount.PersonalData.Address.City       = personalData.Address.City;
            userAccount.PersonalData.Address.Country    = personalData.Address.Country;
            AccountAdministrationService.SaveOrUpdateUser(userAccount);
        }
        public void ChangePassword(long userAccountId, string oldPassword, string newPassword)
        {
            UserAccount userAccount = UserInformationService.GetUserAccountById(userAccountId);

            if (userAccount.Password != AuthorizationService.EncryptPassword(oldPassword))
            {
                //PASSWORD DOES NOT MATCH
            }
            else
            {
                userAccount.Password = AuthorizationService.EncryptPassword(newPassword);
                AccountAdministrationService.SaveOrUpdateUser(userAccount);
            }
        }