Automate Slack invites, for slack chat / community websites. Used by http://struct.tv

invite.rb

module Slack
  class Invite
    def call(options)
      email = options[:email]
      throw "You must call this method with an email" unless email.present?      
      invite = agent.post("https://#{ENV['SLACK_SUBDOMAIN']}.slack.com/api/users.admin.invite?t=#{Time.now.to_i}", 
        {"email" => email,
         "token" => ENV['SLACK_API_TOKEN'],
         "set_active" => "true",
         "_attempts" => "1"
        }
      )
      return invite.body
    end

    def agent
      @agent ||= Mechanize.new
    end

  end
end

I think you meant raise on line 5, not throw