How to get only value without the index in select change method in Angular JS?

Here is my code in HTML.

<select class="form-control" (change)="onChange($event)" 
[ngModel]="user" name="user" >              
<option *ngFor="let user of users async as users;" 
[ngValue]="user.userid">{{user.userName}} </option>                                                          
</select>

Here is my code in Component

onChange($event)
{

   this.userid = $event.target.value;
   console.log(this.userid);
}

When I log the value. Say the user has id – XYZ.
It’s being logged as

1: (Index of the selection)
XYZ 

How do I get only value without the index?

Source: AngularJS