.post(function( req, res ){

                console.log(' called ', req.body ); 1. //getting all properties

                var family = new Family();

                family.username = req.body.username,
                family.password = req.body.password,
                family.familyLeader = req.body.familyLeader,
                family.husband = req.body.husband,
                family.wife = req.body.wife,
                family.kids = req.body.kids;

                console.log( 'family username', req.body.username ); 2.//undefined? not getting

                family.save(function( err, newFamily ) {

                    if( err ) {

                        if ( err.code == 11000) {
                            return res.json({ success: false, message: 'A user with that username already exists. '});
                        }
                        else {
                            return res.send( err );
                        }

                    }

                    res.json({ message: 'Family created!', newFamily: newFamily });

                });


            })

called  { '{"username":"arif","password":"sadfdsa","familyLeader":"sadffsa","husband":"sadfsad","wife":"sadfsad","kids":2}': '' }

family username undefined