Getting user app token using react-native facebook SDK

I've gotten facebook login working using the new https://github.com/facebook/react-native-fbsdk, however I can't seem to get the user token which is usually returned in the response. Anyone found a way to get this information? The other SDK's https://github.com/magus/react-native-facebook-login returns it on the login request but the new FB sdk doesn't, and the documentation on the github page doesn't mention it anywhere.

Found the answer after some more digging. You need to use the fbsdkcore to access the user token. Heres how you use it.

var FBSDKCore = require('react-native-fbsdkcore');
var {
  FBSDKAccessToken,
} = FBSDKCore;

var Login = React.createClass({
  render: function() {
    return (
      <View>
        <FBSDKLoginButton
          onLoginFinished={(error, result) => {
            if (error) {
              alert('Error logging in.');
            } else {
              if (result.isCanceled) {
                alert('Login cancelled.');
              } else {
                FBSDKAccessToken.getCurrentAccessToken((token) => {
                  console.log(token.tokenString);
                })
              }
            }
          }}
          onLogoutFinished={() => console.log('Logged out.')}
          readPermissions={[]}
          publishPermissions={['publish_actions']}/>
      </View>
    );
  }
});