Correct Structure for Multiple Non-hierarchical Keys in DynamoDB

Question

I'm looking for some advice on how to model a table in DynamoDB where I need to lookup on several different keys. The object looks like this:

{
  memberId: string;
  cognitoUserId: string;
  cognitoTmpPassword: string;
  email: string;
  britecoreGroupId: string;
  policyNumbers: string[];
}

We need to be able to perform lookups by memberId, cognitoUserId or email for different use cases. What is the optimal way to structure the table for this?

Thank you!

Answer 1

Ah, I think secondary indexes are what I need. All good.