Get user email id useing login with twitter in ionic 2

Hi i want to get user email id whose login with twitter in my application. my login is successfull and i get all data but i do not get user email id. my code is here.

[spoiler]1. * / Twitter Login /
2. * ** twitterLogin(){**
3. * ** let env = this;**
4. * ** this.tw.login().then(response => {**
5. * ** /* var params = {**
6. * ** ‘include_email’ : true,**
7. * ** }; */**
8. * ** env.tw.showUser().then(function(user){**
9. * ** let fullname = user.name;**
10. * ** let names = fullname.split(" ");**
11. * ** let firstName = names[0];**
12. * ** let lastName = names[(names.length -1)];**

    • ** var str = “neonatal” ;**
    • ** var date: any = new Date();**
    • ** var today_date = date.getFullYear() + ‘-’ + (‘0’ + (date.getMonth() + 1)).slice(-2) + ‘-’ + (‘0’ + date.getDate()).slice(-2);**
    • ** var apiKey = md5(str + today_date,‘hex’);**
    • ** var request={**
    • ** apiKey: apiKey,**
    • ** firstName: firstName,**
    • ** lastName: lastName,**
    • ** userEmail: ‘praveen.ppass@gmail.com’,**
    • ** userImage: ‘’,**
    • ** socialLoginType: ‘Twitter’**
    • ** };**
    • ** this.loading.show();**
    • ** this.loginService.twitter_Login(request).map(response => response.json()).subscribe(response => {**
    • ** this.loading.hide();**
    • ** if(response.success == 1){**
    • ** this.storage.set(‘id’, response.result.userDetail.id);**
    • ** this.storage.set(‘userName’, response.result.userDetail.userName);**
    • ** this.storage.set(‘email’, response.result.userDetail.userEmail);**
    • ** this.storage.set(‘userNca’, response.result.userDetail.userImage);**
    • ** this.storage.set(‘login’, ‘Twitter’);**
    • ** this.navCtrl.setRoot(TabsPage);**
    • ** this.events.publish(‘username:changed’, response.result.userDetail.userName);**
    • ** this.events.publish(‘userimagenca:changed’, response.result.userDetail.userImage);**
    • ** }else {**
    • ** this.toastCtrl.show(response.errorMessage);**
    • ** }**
    • ** });**
    • ** },(error)=>{**
    • ** console.log(error);**
    • ** });**
    • },(error)=>{
    • ** console.log(error);**
    • ** });**
    • }[/spoiler]

hi there! Did you manage to get the email? If so, could you explain me how? I 've read about some permissions required and I did request them on Twitter Developers, but still, can’t get email.