user.service.ts Authentication JWT Angular 9 Lumen 7

user.service.ts

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

// for Lumen 7 back-end
const API_URL = 'http://localhost:8000/api/test/';
// for Node.js back-end
// const API_URL = 'http://localhost:9090/api/test/';

@Injectable({
  providedIn: 'root'
})
export class UserService {

  constructor(private http: HttpClient) { }

  getPublicContent(): Observable<any> {
    return this.http.get(API_URL + 'all', { responseType: 'text' });
  }

}