text: 
  var mongoose = require('mongoose');
  
  var schema = {
      StaffId: String,
      StaffName: String,
      ListClass:[],
      Type:String,
  	user:String,
  	password:String
  }
  
  var Staff = mongoose.model("Staff", schema);
  
  
  module.exports =  mongoose.model('staff', {
      StaffId: String,
      StaffName: String,
      ListClass: [],
      Type: String,
      user: String,
      password: String
  });