text: var mongoose = require("mongoose");
  var Schema = mongoose.Schema;
  
  var user = new Schema({
      user_id: {type:Schema.Types.ObjectId,index:true,unique:true,default:null},    
      screen_name: {type:String,default:null},
      full_name: {type:String,default:null},
  		following_count: {type:Number,default:null},
  		follower_count: {type:Number,default:null}
  });
  
  module.exports = mongoose.model("User",user);