getEmployees() {
    let url = 'http://localhost:8000/api/employees';
    let token = '3|7eBr5iAUPgqQz3lxIFgC72Yh3ERO76g1MyuHNOGD';
    let header = {
      headers: new HttpHeaders()
        .set('Authorization', `Bearer ${token}`)
    }
    return this.http.get<any>(url, header);
  }