request.rb

module Request
  [:get, :post, :put, :delete].each do |verb|
    define_method verb do |url, payload: {}, headers: {}|
      headers = define_headers(headers)
      execute(verb, url, payload, headers)
    end
  end

  def define_headers(headers)
    default_headers = {
      'Authorization' => "Bearer token",
      'Accept' => 'application/json'
    }
    default_headers.merge(headers)
  end

  private

  def execute(method, url, payload, headers)
    RestClient::Request.execute(method: method, url: url, payload: payload, headers: headers)
  end
end