fix(AWS DynamoDB Node): Fix issue pagination and simplify issue #4956 #…

…4957 (#4959)

* Added 'M' type to decode attribute for dynamodb

* Fixed bug with return all. Headers from the previous iteration were being passed causing an invalid signature error

packages/nodes-base/nodes/Aws/DynamoDB/GenericFunctions.ts

@@ -66,7 +66,8 @@ export async function awsApiRequestAllItems(
 	let responseData;
 
 	do {
-		responseData = await awsApiRequest.call(this, service, method, path, body, headers);
+		const originalHeaders = Object.assign({}, headers); //The awsapirequest function adds the hmac signature to the headers, if we pass the modified headers back in on the next call it will fail with invalid signature
+		responseData = await awsApiRequest.call(this, service, method, path, body, originalHeaders);
 		if (responseData.LastEvaluatedKey) {
 			body!.ExclusiveStartKey = responseData.LastEvaluatedKey;
 		}

packages/nodes-base/nodes/Aws/DynamoDB/utils.ts

@@ -81,6 +81,8 @@ function decodeAttribute(type: AttributeValueType, attribute: string) {
 		case 'SS':
 		case 'NS':
 			return attribute;
+		case 'M':
+			return simplify(attribute);
 		default:
 			return null;
 	}