// JavaScript

auth: function(username, password, callback) {
  var self = this;
  var hash = this._encodePassword(password);
  this.model.find({name: username, encoded_password: hash}, function(err, docs) {
    if (docs.length == 0) return callback(false);
    var user = docs[0];
    self._generateToken(user, function(token) {
      callback(user, token);
    });
  });
}