def valid?(request)
      begin
        valid!(request)
      rescue AlexaVerifier::BaseError => e
        puts e

        return false
      end

      true
    end
def valid?(request)
      begin
        valid!(request)
      rescue AlexaVerifier::BaseError => e
        puts e

        return false
      end

      true
    end
Validate a request object from Rack.
 Return a boolean.

 @param [Rack::Request::Env] request a Rack HTTP Request
 @return [Boolean] is the request valid?