public handleDeleteUser(user: Named): Observable<void> {
    return this.showConfirmUserDeleteComponent(user)
      .afterConfirm()
      .pipe(
        switchMap(
          () => this.userManagementService.deleteProjectUser(this.projectId, user.name)
      )).subscribe(
() => {
        this.memberToasterService.userDeleted(user);
        this.fetchUsers();
      },
      (err: HttpErrorResponse) => {
        this.showDeleteUserErrorToaster(err);
      },
    );
  }