def default_options(options = {})
      headers = default_headers.merge(options[:headers] || {})
      headers.merge!({USER_AGENT => options[:user_agent]})
      {
        headers: headers,
        ssl: options[:ssl],
        url: options[:endpoint]
      }
    end
def default_options(options = {})
      headers = default_headers.merge(options[:headers] || {})
      headers.merge!({USER_AGENT => options[:user_agent]})
      {
        headers: headers,
        ssl: options[:ssl],
        url: options[:endpoint]
      }
    end
Create default connection options

 @return [Hash[Symbol]]
   the default options

 @api private