ionic2에서 facebook login시 email가져오기

 let permissions = new Array();

      permissions = ["public_profile", "email"];

      Facebook.login(permissions).then(res => {

          let params = new Array();

          Facebook.api('/me?fields=id,email,name,first_name,gender,picture.width(150).height(150),age_range,friends', params).then(response => {});