Describes the cause and action for error messages.
Error Message(English)：
invalid content type specified
Acessing user identity in AWS Lambda - Stack Overflow
https://stackoverflow.com/questions/52199383/acessing-user-identity-in-aws-lambda/52328296
How to send XML data using HttpWebRequest?
http://www.netomatix.com/Development/XmlWebRequest.aspx
configuration - FAQ Database Discussion Community
http://databasefaq.com/index.php/tag/configuration