services:
  awn.service:
    class: DrupalawntrackAwnService
    arguments: []

namespace Drupalawntrack;

/**
 * Class AwnService.
 */
class AwnService {

  /**
   * Constructs a new AwnService object.
   */
  public function __construct() {

  }

    public function sayHello() {
    $result = 'say hello';
    return $result;
  }

}

$import_service = Drupal::service('awn.service');
  dump($import_service);die;