text: var mongoose = require('mongoose');
  var Schema = mongoose.Schema;
  var uniqueValidator = require('mongoose-unique-validator');
  
  var SongSchema = new Schema({
    title: {type: String, required: [true, "can't be blank"], index: true},
    artist: {type: String, required: [true, "can't be blank"], index: true},
    genre: String,
  }, {timestamps: true});
  
  mongoose.model('Song', SongSchema);
  