Gem::S3URISigner#ec2_metadata_token

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/s3_uri_signer.rb, line 196
def ec2_metadata_token
  request = ec2_iam_request(Gem::URI(EC2_IAM_TOKEN), Gem::Net::HTTP::Put)

  response = request.fetch do |req|
    req.add_field "X-aws-ec2-metadata-token-ttl-seconds", 60
  end

  case response
  when Gem::Net::HTTPOK then
    response.body
  else
    raise InstanceProfileError.new("Unable to fetch AWS metadata from #{uri}: #{response.message} #{response.code}")
  end
end