code: def allow_request(self, request, view):
          
          service_users = get_service_usernames()
  
          # User service user throttling rates for service user.
          if request.user.username in service_users:
              self.update_throttle_scope()
  
          return super(ServiceUserThrottle, self).allow_request(request, view)
docs: Modify throttling for service users.
  
          Updates throttling rate if the request is coming from the service user, and
          defaults to UserRateThrottle's configured setting otherwise.
  
          Updated throttling rate comes from `DEFAULT_THROTTLE_RATES` key in `REST_FRAMEWORK`
          setting. service user throttling is specified in `DEFAULT_THROTTLE_RATES` by `service_user` key
  
          Example Setting:
              ```
              REST_FRAMEWORK = {
                  ...
                  'DEFAULT_THROTTLE_RATES': {
                      ...
                      'service_user': '50/day'
                  }
              }
              ```