// defining a mongoose schema
 // including the module
  var mongoose = require('mongoose');
 // declare schema object.
 var Schema = mongoose.Schema;

 var blogSchema = new Schema({

 title : {type:String,default:'',required:true },
  subTitle : {type:String,default:''},
 blogBody : {type:String,default:''},
 tags   : [],// name of tags in array
 created    : {type:Date},
 lastModified : {type:Date},
 authorInfo  :  {} // information of author in form of obje-ct
 });

 mongoose.model('Blog',blogSchema);

userName : {type:String,default:''} ,
  passWord : {type:String,default:''}

 like

 // defining a mongoose schema
 // including the module
 var mongoose = require('mongoose');
 // declare schema object.
 var Schema = mongoose.Schema;

 var blogSchema = new Schema({

 title : {type:String,default:'',required:true},
  subTitle : {type:String,default:''},
  blogBody : {type:String,default:''},
  tags : [],// name of tags in array
  created : {type:Date},
  lastModified : {type:Date},
  authorInfo  :  {} // information of author in form of obje-ct
 userName : {type:String,default:''} ,----------------------------------here
  passWord : {type:String,default:''} ----------------------------------here
 });

C:leveltwoassigntwoblogModel.js:19
  userName        : {type:String,default:''}
    ^^^^^^^^
SyntaxError: Unexpected identifier
at createScript (vm.js:56:10)
at Object.runInThisContext (vm.js:97:10)
at Module._compile (module.js:542:28)

 because of the above problem i am unable to create a new entries in the
 project and even my  postman is also not responding.
 please reply if anyone knows ..... thank you.