# File lib/jwt/verify.rb, line 59
    def verify_iss
      return unless (options_iss = extract_option(:iss))

      if @payload['iss'].to_s != options_iss.to_s
        raise(
          JWT::InvalidIssuerError,
          "Invalid issuer. Expected #{options_iss}, received #{@payload['iss'] || '<none>'}"
        )
      end
    end