Gem::S3URISigner#ec2_metadata_credentials_json

# File tmp/rubies/ruby-4.0.0/lib/rubygems/s3_uri_signer.rb, line 147
def ec2_metadata_credentials_json
  require_relative "vendored_net_http"
  require_relative "request"
  require_relative "request/connection_pools"
  require "json"

  # First try V2 fallback to V1
  res = nil
  begin
    res = ec2_metadata_credentials_imds_v2
  rescue InstanceProfileError
    alert_warning "Unable to access ec2 credentials via IMDSv2, falling back to IMDSv1"
    res = ec2_metadata_credentials_imds_v1
  end
  res
end