Async/await not working on service about inversify-express-utils HOT 1 CLOSED

@injectable()
export class UserService {
  private async run(){
        await this.sleep(2000);
        console.log('Free');
        await this.sleep(2000);
        console.log('Free');
        await this.sleep(2000);
        console.log('Free');
    }
    private sleep(ms) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }

  public async getUsers(): Promise<IUser[]> {
    await this.run().then(() => {
      console.log('finish');
    });

    return this.userStorage;
  }
}