require 'httparty'
require 'vine'
class Hash
  def to_xml
    map do |k, v|
      text = v.class==Hash ? v.to_xml : v
      "<%s>%s</%s>" % [k, text, k]
    end.join
  end
end

hash={"client" =>
        {"first_name"=>"rishabh",
      "last_name" =>"adi",
      "organization" =>"test",
      "email"=>"foobar@xml.com"

        }
    }
auth={:username =>API_KEY, :password => "X"}

string ="<?xml version=\'1.0'\ encoding= \'utf-8'\ ?>
<request method=\'client.create'> #{hash.to_xml} </request>"
response=HTTParty.post(API_URL,
    :body => string,
    :basic_auth => auth
    )