aws-lambda-dynamodb-stream

1. Enable Dynamodb table by choosing the different type of stream.

   a. Keys only - only the key attributes of the modified item

   b. New image - the entire item, as it appears after it was modified

   c. Old image - the entire item, as it appeared before it was modified

   d. New and old images - both the new and the old images of the item

2. Go to the Table / Trigger Tab and select existing lambda(streamTriggered).