Progress check

Before wrapping up, in this chapter we:

Learned what secondary indexes are and how to use them to enable a different query pattern (get all donors from a specific city)
Deleted our DynamoDB table one last time… :)
Learned about and enabled DynamoDB streams so that our application can react to DynamoDB inserts
Learned about and configured stream data filtering which enabled us to react only to new blood donation events
Used AWS SES to send emails to donors from a specific city whenever a new blood donation event is created

If any of these is not working for you - please let me know. If everything mentioned above worked for you, great!