The constructor for the TeamService

teamServiceConstructor.ts

private teamWatchSource = new BehaviorSubject(new TeamModel());
_teamWatchSource: Observable<TeamModel> = this.teamWatchSource.asObservable();
  
constructor(private http: HttpClient, private zone: NgZone) {
  this.getTeamsStream().subscribe(data => {
      this.teamWatchSource.next(new TeamModel().deserialize(data));
    }, error => console.log('Error: ' + error),
    () => console.log('done loading team stream'));
}