react-native fbsdk is returning email undefined - facebook

Question

I m trying to get information through the facebook sdk but so far I am getting only the id and the name of the user. I do have granted the premission but still the email is not popping out like name and id.
I try to console.log(result.email) but i got undefined .
Any help would be appreciated.
Thanks in advance
import React, { Component } from 'react';
import { View } from 'react-native';
import { LoginButton, AccessToken ,GraphRequest, GraphRequestManager} from 'react-native-fbsdk';
export default class Login extends Component {
render() {
return (
<View>
<LoginButton
onLoginFinished={
(error, result) => {
if (error) {
alert("login has error: " + result.error);
} else if (result.isCancelled) {
alert("login is cancelled.");
} else {
AccessToken.getCurrentAccessToken().then(
(data) => {
let accessToken = data.accessToken
alert(accessToken.toString())
const responseInfoCallback = (error, result) => {
if (error) {
console.log(error)
alert('Error fetching data: ' + error.toString());
} else {
console.log(result)
console.log(result.email)
alert('Success fetching data: ' + result.toString());
}
}
const infoRequest = new GraphRequest(
'/me',
{
accessToken: accessToken,
parameters: {
fields: {
string: 'name,email'
}
}
},
responseInfoCallback
);
// Start the graph request.
new GraphRequestManager().addRequest(infoRequest).start()
}
)
}
}
}
onLogoutFinished={() => alert("logout.")}/>
</View>
);
}
}