google-api-ads-ruby - AuthenticationError.CLIENT_CUSTOMER_ID_IS_REQUIRED for CustomerService v201502

Hello all I'm using google-api-ads-ruby with Ruby on Rails for an app which is tracking some Google Adwords data. Recently I've updated google-api-ads-ruby and now I'm get in stuck with AuthenticationError.CLIENT_CUSTOMER_ID_IS_REQUIRED error on CustomerService call. My task is to get basic

oauth2 service account with google adwords api for ruby

Hello all, I was using ClientLogin authorization method in my server application for several months, but now it throws CaptchaRequired error because of too much authorization attempts for about 100 client_customer_id in a batch, so I'm looking for the way to get 100+ client accounts processed