Configuration model

configuration.rb

module Telegram
  module Bot
    class Configuration
      attr_accessor :adapter

      def initialize
        @adapter = Faraday.default_adapter
      end
    end
  end
end

useconfig.rb

module Telegram
  module Bot
    class << self
      attr_writer :configuration
    end

    def self.configuration
      @configuration ||= Configuration.new
    end

    def self.configure
      yield(configuration)
    end
  end
end