encode_csrf_token

# File actionpack/lib/action_controller/metal/request_forgery_protection.rb, line 478
      def encode_csrf_token(csrf_token) # :nodoc:
        if urlsafe_csrf_tokens
          Base64.urlsafe_encode64(csrf_token, padding: false)
        else
          Base64.strict_encode64(csrf_token)
        end
      end