constructor(public router: Router, public zone: NgZone) {
    super();
    this.subscribe('userList');
    this.subscribe('extraDuties');
    this.subscribe('duties');
    this.subscribe('jobPositions');
    this.subscribe('trainees');
    this.autorun(() => {
      this.duty = Duties.findOne({duty: 'Trainer'});
      this.position = JobPositions.findOne({jobPositionName: 'Detention Supervisor'});
    });
  }