You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: jira_agent.rb
    path of file: ./repos/huginn/app/models/agents
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby

require 'cgi'
require 'httparty'
require 'date'

module Agents
  class JiraAgent < Agent
    include WebRequestConcern

    cannot_receive_events!

    description
    
    def validate_options
      errors.add(:base,
                 "you need to specify password if user name is set") if options['username'].present? and !options['password'].present?
      errors.add(:base, "you need to specify your jira URL") unless options['jira_url'].present?
      errors.add(:base,
                 "you need to specify the expected update period") unless options['expected_update_period_in_days'].present?
      errors.add(:base, "you need to specify request timeout") unless options['timeout'].present?
    end