module Validations
  def

  def validate(values)
    errors = []
    errors << "Username or password empty" if values[:username].empty? || values[:password].empty?

  end
end

class User
  include Validations
  attr_accessor :username, :password
  attr_reader :logged_in
  attr_reader :errors

  def initialize
    @errors = []
    @logged_in = false
  end

  def login
    @errors = validate({ username: username, password: password })
    if @errors.empty?
      @logged_in = true
      return true
    else
      return false
    end
  end
end