# File lib/vagrant_cloud/provider.rb, line 110
    def upload_file(file_path, username = nil, box_name = nil, version_number = nil, provider_name = nil)
      url = upload_url(username, box_name, version_number, provider_name)
      payload = File.open(file_path, 'r')
      RestClient::Request.execute(
        method: :put,
        url: url,
        payload: payload,
        ssl_version: 'TLSv1'
      )
    end