I am trying to restrict user to just view its own data and not anyone else's. So, if a user (bob) tries to hit
/api/v1/get-device-info?username=jon
, I want API gateway to send 403, only allowing username=bob. On the Lambda side, I am getting data from RDS. To solve this, I was looking at Custom Authorizers and got blocked thinking how to establish the identity of the user making the query.