node.js - in node js ,how to set login permission on facebook developer API? -

my code is:- .. , give me error in "output" ,how can solve it??

code:

var fb=require('fb');     fb.login(function(response) {         // handle response         if (response.status === 'connected') {             console.log('logged in.');         }         else {             fb.login();         }     },     {scope: 'publish_actions',         return_scopes: true     });    output: fb.login(function(response) {        ^      typeerror: fb.login not function         @ object.<anonymous> (c:\users\vvlocal\desktop\work\facebook\fblogin.js:3:4) 

var options = {} var fb = require('fb'), fb = new fb.facebook(options);  fb.login(function(response) {     // handle response     if (response.status === 'connected') {         console.log('logged in.');     }     else {         fb.login();     } }, {scope: 'publish_actions',     return_scopes: true }); 

try didn't test ;)