Get url to AppBrowser

Ionic Framework ionic-v3
1

I want to get url to iab.create but it’s not defined.but it 's not work

 public showMap() {
    // this.iab.create('https://www.google.com/maps/place/Pencil+Market/@11.5586454,104.9339044,15z/data=!4m2!3m1!1s0x0:0x34af5d1d1b723a49?sa=X&ved=2ahUKEwigjejBw7vjAhUYdCsKHbyWC4cQ_BIwCnoECA8QCA');
    let url = this.getContact();
    let target = '_blank';
    this.iab.create('https://www.google.com/maps/'+ url,target,this.options);
  }

public async getContact(){
    const loading = await this.loadingController.create({
      duration: 1000,
      message: "Loading"

    })
    await loading.present();
    await this.api.getContact()
    .subscribe(res => {
      this.contact = res;
      loading.dismiss();
    },err =>{
      console.log(err);
    });
  }