selectedCity(lat, lng) {
    return new Promise((resolve, reject) => {
       this.loginService.getDarkskyData(lat, lng).subscribe(res => {
        if (res.data) {
          this.weatherInfoDarkSky = res.data.darksky;
        }
      }, error => {
        console.log(error);
   });

**** Same will be done for all the service providers ****