$req

$req is an HTTP request object that can be used within a REST API action. Use the $req object to retrieve request data.
Refer to the Amazon Gateway API page for more information on the properties of the $req object.

Property	Type
body	string
headers	Object
httpMethod	string
isBase64Encoded	boolean
multiValueHeaders	Object
multiValueQueryStringParameters	Object
Path	string
pathParameters	Object
queryStringParameters	Object
requestContext	Object
resource	string
stageVariables	Object