How to populate mat-option with elements from an array received from api

I have an issue and i think im missing something because i cant populate the md-option with the elements received from an API.

Here is the service.ts where i make the call and i try to retrieve the data from the API.

getCars(){
 this.http.get(this.rootURL+'/car/getallcars')
 .toPromise()
 .then(res => this.carList = res as Cars[]);
}

Basically the api returns something like this:

{
"id": "b49981fc-730e-49fc-b5e4-0159f4b42c9d",
"brand": "Mercedes",
"model": "G-Klasse",
"mileage": 19000,
"isAvailable": true
}

In the html i have like this:

<mat-form-field appearance="fill">
<mat-label>Field</mat-label>
<mat-select name="myField"  #brand="ngModel [(ngModel)]="service.formData.brand">
<mat-option *ngFor ="let car of carList" [value]="car.id" >{{car.brand}}</mat-option>
</mat-select>

Here comes the issue.. I dont know how should i write in the component.ts to take the elements from API and populate this mat-option.

Can you please try with below code?

in your service.ts file replace below code

getCars(){
  return this.http.get(this.rootURL+'/car/getallcars');
}

In your component.ts file

ngOnInit() {
    if (!this.service.formData) {
        this.resetForm();
    }
    this.getCarsData();
}

cars: any = [];
getCarsData(): void{
    this.service.getCars().subscribe(data => {
       console.log(data);
       this.cars = data;
    });
}

In your component.html file

<mat-label>Field</mat-label>
<mat-select name="myField"  #brand="ngModel [(ngModel)]="service.formData.brand">
  <mat-option *ngFor ="let car of cars" [value]="car.id" >{{car.brand}}</mat-option>
</mat-select>