def check_auth_params
      if (Fulfil.authentication.nil? || Fulfil.authentication[:subdomain].empty? || Fulfil.authentication[:api_key].empty?)
        raise Fulfil::AuthenticationError, "Please set your subdomain and api key"
      end
    end
def check_auth_params
      if (Fulfil.authentication.nil? || Fulfil.authentication[:subdomain].empty? || Fulfil.authentication[:api_key].empty?)
        raise Fulfil::AuthenticationError, "Please set your subdomain and api key"
      end
    end
USed to check if auth is done properly before making calls