Hubspot auth handler for use in private or public API

gistfile1.rb

require 'httparty'

class HubspotAuthHandler
  HUBSPOT_LOGIN_URL = "https://login.hubspot.com/login/newLoginSubmit?loginPortalId=-1&loginRedirectUrl=&includeAuthToken=false"
  HUBSPOT_HANDSHAKE_URL = "https://login.hubspot.com/login/api-verify"

  def initialize(username, password)
    @username = username
    @password = password

    set_auth_token_and_expires_at
  end

  def auth_token
    set_auth_token_and_expires_at if DateTime.now > @expires_at
    @auth_token
  end

  def expires_at
    set_auth_token_and_expires_at if DateTime.now > @expires_at
    @expires_at
  end

  private

  def set_auth_token_and_expires_at
    login_response = HTTParty.post(HUBSPOT_LOGIN_URL, login_form_data)
    @portal_id = login_response.request.uri.path.split("/").last
    @cookie = login_response.request.options[:headers]["Cookie"]
    handshake_response = HTTParty.post(HUBSPOT_HANDSHAKE_URL, handshake_form_data)

    access_token = handshake_response["auth"]["access_token"]
    @auth_token = access_token["token"]
    @expires_at = Time.at(access_token["expires_at"] / 1000.0).to_datetime
  end

  def login_form_data
    {
      query: {
        username: @username,
        password: @password,
      },
    }
  end

  def handshake_form_data
    {
      query: {
        portalId: @portal_id,
      },
      headers: {
        'Cookie' => @cookie,
      },
    }
  end
end

@auth = HubspotAuthHandler.new("foo.bar@foobar.com", "password")

puts @auth.auth_token
puts @auth.expires_at