var mongoose = require('mongoose');

var userSchema = mongoose.Schema({
  linkHash: String,
  senderID: String,
  receiverID: Array
});

module.exports = mongoose.model('User', userSchema);
@@ -117,16 +117,21 @@
 ceiverID
+Array
 : Array%0A

Change schema attribute name with kcvan in user_schema.js