HTTPARTY => Install HTTPARTY gem

gem install 'httparty'

Install the Paybook API Gem Using this command into the terminal / cmd:

gem install 'paybook'

Add the gem to your Project

require 'paybook'

Then Instance the Class API passing Our API KEY into the method new

paybook = Paybook::Api.new("API KEY GOES HERE")

Then You Can Execute all the methods inside the class API example:

paybook.user_list