Fix

gistfile1.rb

CLAIMS_MAP = {
        :expires => :exp,
        :notBefore => :nbf,
        :admin => :admin,
        :debug => :debug,
        :simulate => :simulate
    }

    def create_options_claims(options)
      opts = {}
      options.each do |key, value|
        if CLAIMS_MAP.include?(key.to_sym) then
          opts[CLAIMS_MAP[key.to_sym].to_sym] = value
        else
          raise ArgumentError, "#{key.to_s} is not a valid option"
        end
      end
      opts
    end