constructor(){
    this.client = new HttpClient();
    this.client.configure(x => {
       x.withBaseUrl("https://myendpoints.com/api/")
       x.withInterceptor({
           request(request){
              //Add auth token to header
              return request;
           }
       })
    });
}

//This API endpoint has no redirect
getProfile(){
    return this.client.get("me")
     .then(data => {
        this.profile = JSON.parse(data.response);
        return this.profile;
      });
}

//This service calls an API endpoint that will redirect
getContacts(){
    return this.client.get("me/contacts")
      .then(data => {
         this.contacts = JSON.parse(data.response);
         return this.contacts;
      })
      .catch(err => { console.log(err); })
 }

 //this service calls the API endpoint directly -- no redirect
 getContactsDirect(accountId){
      return this.client.get(`account/${accountId}/contacts`)
        .then(data => {
           this.contacts = JSON.parse(data.response);
           return this.contacts;
         })
        .catch(err => { console.log(err); })
 }