[toplevel]

keychain = 
  !f() {
     ACCESS_KEY=$(security find-generic-password -s "aws demo access" -w reinvent)
     SECRET_KEY=$(security find-generic-password -s "aws demo secret" -w reinvent)
     echo \{\"AccessKeyId\":\""$ACCESS_KEY"\",\"SecretAccessKey\":\""$SECRET_KEY"\",\"Version\":1\}
  }; f