code: def notify_program_learners(cls, enterprise_customer, program_details, users):
          
          program_name = program_details.get('title')
          program_branding = program_details.get('type')
          program_uuid = program_details.get('uuid')
  
          lms_root_url = get_configuration_value_for_site(
              enterprise_customer.site,
              'LMS_ROOT_URL',
              settings.LMS_ROOT_URL
          )
          program_path = urlquote(
              '/dashboard/programs/{program_uuid}/?tpa_hint={tpa_hint}'.format(
                  program_uuid=program_uuid,
                  tpa_hint=enterprise_customer.identity_provider,
              )
          )
          destination_url = '{site}/{login_or_register}?next={program_path}'.format(
              site=lms_root_url,
              login_or_register='{login_or_register}',
              program_path=program_path
          )
          program_type = 'program'
          program_start = get_earliest_start_date_from_program(program_details)
  
          with mail.get_connection() as email_conn:
              for user in users:
                  login_or_register = 'register' if isinstance(user, PendingEnterpriseCustomerUser) else 'login'
                  destination_url = destination_url.format(login_or_register=login_or_register)
                  send_email_notification_message(
                      user=user,
                      enrolled_in={
                          'name': program_name,
                          'url': destination_url,
                          'type': program_type,
                          'start': program_start,
                          'branding': program_branding,
                      },
                      enterprise_customer=enterprise_customer,
                      email_connection=email_conn
                  )
docs: Notify learners about a program in which they've been enrolled.
  
          Args:
              enterprise_customer: The EnterpriseCustomer being linked to
              program_details: Details about the specific program the learners were enrolled in
              users: An iterable of the users or pending users who were enrolled