I am following this fundamental tutorial on Angular about Http.
As one can see in the \"Setup: Installing the module\" section, they import the HttpClientModule as f
You should import http from @angular/http in your service:
http
@angular/http
import {Http} from '@angular/http'; constructor(private http: http) {} // <--Then Inject it here // now you can use it in any function eg: getUsers() { return this.http.get('whateverURL'); }