承诺链末尾的返回值

Question

我试图在承诺链的末尾返回一个对象：

var signUp = function(fb_ID,fb_accessToken) {

    console.log("signup")

    var TokenStorage = Parse.Object.extend("tokenStorage");
    var restrictedAcl = new Parse.ACL();
    var output = {}
    var username;
    var password;

    return new Promise(function(resolve){ 
        ExtendFacebookAccessToken(fb_accessToken).then(function(new_fb_accessToken){

            restrictedAcl.setPublicReadAccess(false);
            restrictedAcl.setPublicWriteAccess(false);
            var user = new Parse.User();

            // Generate a random username and password.
            /*
            var username = new Buffer(24);
            var password = new Buffer(24);
            _.times(24, function(i) {
                username.set(i, _.random(0, 255));
                password.set(i, _.random(0, 255));
            });
            */

            username = (Date.now().toString(36) + Math.random().toString(36).substr(2, 10)).toUpperCase();
            password = (Date.now().toString(36) + Math.random().toString(36).substr(2, 10)).toUpperCase();

            user.set("username", username.toString('base64'));
            user.set("password", password.toString('base64'));

            // Sign up the new User
            return user.signUp().then(function(user) {
                console.log('user:'+JSON.stringify(user))
                // create a new TokenStorage object to store the user+GitHub association.
                var ts = new TokenStorage();
                ts.set('facebookID', fb_ID);
                ts.set('fb_accessToken', new_fb_accessToken);
                ts.set('username',username)
                ts.set('password',password)
                ts.set('user', user);

                ts.setACL(restrictedAcl);
                // Use the master key because TokenStorage objects should be protected.
                return ts.save(null, { useMasterKey: true } );
            }).then(function(tokenStorage) {
                console.log('ggg:')
                //var promise = new Parse.Promise();
                output.username = username;
                output.password = password;
                output.process = "signup";
                output.fb_accessToken = new_fb_accessToken;
                output.success = true;
                output.isnewuser = true;
                //promise.resolve(output);
                //return output
            });
        })
    })
    resolve(output)     
}

＆＃39;输出＆＃39;当我使用＆＃39;然后＆＃39;来调用函数时，不返回对象：     注册（fb_ID，fb_accessToken）。然后（功能（数据）{                     的console.log（＆＃39;数据＆＃39 + JSON.stringify（数据））     }） 数据对象不会在＆＃39;输出＆＃39; SignUp函数内的对象。有什么想法吗？