gistfile1.txt

    login: Promise.method(function (email, password) {
      if (!email || !password) throw new Error("Email and password are both required.");
      var storage = { user: null };
      var fetchPromise = new this({ email: email.toLowerCase().trim() })
        .bind(storage)
        .fetch({ require: true })
        .then(function (user) {
          this.user = user;
          return bcrypt.compareAsync(password, user.get('password'))
        })
        .then(function (samePassword) {
          if (!samePassword) throw new Error("Invalid email or password");
          return Promise.resolve(this.user);
        })
        return fetchPromise;
    }),