lib/createsend/client.rb
def transfer_credits(credits, can_use_my_credits_when_they_run_out)
      options = { :body => {
        :Credits => credits,
        :CanUseMyCreditsWhenTheyRunOut => can_use_my_credits_when_they_run_out
      }.to_json }
      response = post 'credits', options
      Hashie::Mash.new(response)
    end
def transfer_credits(credits, can_use_my_credits_when_they_run_out)
      options = { :body => {
        :Credits => credits,
        :CanUseMyCreditsWhenTheyRunOut => can_use_my_credits_when_they_run_out
      }.to_json }
      response = post 'credits', options
      Hashie::Mash.new(response)
    end
Transfer credits to or from this client.

 credits - An Integer representing the number of credits to transfer.
   This value may be either positive if you want to allocate credits from
   your account to the client, or negative if you want to deduct credits
   from the client back into your account.
 can_use_my_credits_when_they_run_out - A Boolean value representing
   which, if set to true, will allow the client to continue sending using
   your credits or payment details once they run out of credits, and if
   set to false, will prevent the client from using your credits to
   continue sending until you allocate more credits to them.

 Returns an object of the following form representing the result:
 {
   AccountCredits # Integer representing credits in your account now
   ClientCredits # Integer representing credits in this client's
     account now
 }