public user: User;
public roles: Role[];
public organizations: Organization[];

public ngOnInit() {
  this.user$ = this.userService.getUser(1).share();
  this.roles$ = this.roleService.getRoles().share();
  this.organizations$ = this.organizationService.getOrganizations().share();

  Observable.forkJoin([this.user$, this.roles$, this.organizations$]).subscribe(data => {
    this.user = data[0];
    this.roles = data[1];
    this.organizations = data[2];
  });
}