userlocation;
 userservice ;
 usercategory ;

 constructor(public http: HttpClient, public storage : Storage) { }

 getListings(){

 this.storage.get('area').then((userlocation) => {
  this.userlocation =  userlocation;

  console.log(this.userlocation)
 });

  this.storage.get('ser').then((userlocation) => {
  this.userlocation =  userlocation;

  console.log(this.userlocation)
 });

  return  this.http.get(this.api_url+"?location="+ this.userlocation+
  "&ser= " + this.userservice)

 }