import {Component} from '@angular/core';
import { Response } from '@angular/http';
import {RecipeDataService} from '../shared/RecipeData.service';
import {SignupUserService} from '../auth/signupUser.service';


@Component({
  selector: 'app-header',
  templateUrl: './header.component.html',
  styleUrls: ['./header.component.css']
})
export class HeaderComponent {
  constructor(private RecipeDataService: RecipeDataService,
              private authService: SignupUserService) { }
  OnSave()
  {
    this.RecipeDataService.OnSaveRecipe()
      .subscribe(
        (response: Response) =>
        {
          console.log(response);
        }
      );
  }
  OnGet()
  {
    this.RecipeDataService.OnGettingRecipe();
  }




}

И содержимое сервиса, на который ссылаюсь:
import {Injectable} from '@angular/core';
import * as firebase from 'firebase';


@Injectable()

export class SignupUserService {
  token = '';
  signUpUser(email: string, password: string) {
    firebase.auth().createUserWithEmailAndPassword(email, password)
      .catch(
        error => console.log(error)
      );
  }
  signInUser(email: string, password: string)
  {
    firebase.auth().signInWithEmailAndPassword(email, password)
      .then(
        response => {
          firebase.auth().currentUser.getIdToken()
            .then(
              (token: string) => this.token = token
            );
        }
        )
      .catch (
        error => {console.log(error); }
      );
  }
  getToken() {
    firebase.auth().currentUser.getIdToken()
      .then(
        (token: string) => this.token = token
      );
    return this.token;
  }
  isAuthenticated(): boolean
  {
    return this.token != null;
  }
}

constructor(private RecipeDataService: RecipeDataService,
              public authService: SignupUserService) { }